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artikkel ajakirjas EST / artikkel ajakirjas ENG

Buildings' energy efficiency measures effect on CO2 emissions in combined heating, cooling and electricity productionPylsy, Petri; Lylykangas, Kimmo Sakari; Kurnitski, JarekRenewable and sustainable energy reviews2020 / art. 110299, 18 p : ill https://doi.org/10.1016/j.rser.2020.110299 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS

artikkel ajakirjas EST / artikkel ajakirjas ENG
2

artikkel ajakirjas EST / artikkel ajakirjas ENG

Day-ahead market modelling of large-scale highly-renewable multi-energy systems : analysis of the North Sea region towards 2050Gea-Bermudez, Juan; Das, Kaushik; Koduvere, Hardi; Koivisto, Matti J.Energies2021 / art. 88, 17 p. : ill https://doi.org/10.3390/en14010088 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS

artikkel ajakirjas EST / artikkel ajakirjas ENG
3

artikkel kogumikus

The use of thermal energy storage for energy system based on cogeneration plantVolkova, Anna; Siirde, AndresRecent Researches in Geography, Geology, Energy, Environment and Biomedicine : Proceedings of the 4th WSEAS International Conference on Engineering Mechanics, Structures, Engineering Geology (EMESEG '11) : Proceedings of the 2nd International Conference on Geography and Geology 2011 (WORLD-GEO '11) : Proceedings of the 5th International Conference on Energy and Development - Environment - Biomedicine 2011 (EDEB '11), Corfu Island, Greece, July 14-16, 20112011 / p. 71-75 : ill

artikkel kogumikus

Kirjeid leitud 3, kuvan 1 - 3

1. energy system
2. energy system analysis
3. energy system management
4. energy system model
5. energy system modeling
6. energy system modelling
7. heating energy system
8. hybrid energy system
9. hybrid renewable energy system
10. integrated energy system
11. Regional integrated energy system (RIES)
12. renewable energy system
13. transactive energy system
14. battery energy storage system
15. energy management system
16. energy management system (EMS)
17. energy storage system
18. energy storage system (ESS)
19. energy-management system
20. home battery energy storage system (HBESS)
21. home energy management system
22. residential battery energy storage system
23. residential wind energy conversion system
24. smart energy management system (SEMS)
25. battery energy storage systems
26. battery energy storage systems (BESS)
27. building energy management systems
28. cyber physical energy systems
29. cyber-physical energy systems
30. distributed energy systems
31. energy and HVAC-systems in buildings
32. energy management systems
33. energy storage systems
34. energy storage systems (ESS)
35. energy systems
36. flywheel energy storage systems (FESS)
37. home energy management systems
38. Hybrid Energy Storage Systems
39. integrated energy systems
40. Novel energy storage systems
41. personalized energy management systems (PEMS)
42. renewable energy systems
43. renewable energy systems (RES)
44. residential energy storage systems
45. smart green energy systems
46. water-energy systems
47. energy forecast wind energy
48. EROI-Energy returned on energy invested
49. activation energy
50. alternative energy production
51. annual energy simulation
52. balancing wind energy
53. batteries energy storage
54. battery energy storage
55. battery energy storage degradation
56. binding energy
57. bio-energy
58. Black Sea energy resources
59. Bluetooth low-energy tracking technology
60. braking energy
61. building energy efficiency
62. building energy modelling
63. building energy performance
64. building energy performance simulations
65. building energy renovation
66. building energy simulation
67. building energy use
68. carbon-neutral energy supply
69. clean energy
70. climate/energy policy
71. CO2 emissions energy renovation
72. corporate energy self-sufficiency
73. cortical and hippocampal energy metabolism
74. cost of energy performance
75. criteria of energy efficiency
76. cumulative wave energy
77. daily cumulative energy curves
78. deep energy levels
79. deep energy renovation
80. devices for energy harvesting
81. DHW energy use
82. digital tools for energy users
83. direct energy deposition
84. directed energy deposition
85. distributed activation energy model
86. distributed energy resources
87. distributed energy resources (DERs)
88. Distributed energy storage
89. district energy
90. district energy sector
91. dual-energy x-ray absorptiometry
92. early stage energy assessment
93. electric energy storage
94. electric energy substitution
95. electrical energy
96. electrical energy market
97. electricity energy use
98. Electrochemical energy conversion/storage
99. electrochemical energy storage
100. embodied energy
101. empirical energy consumption model
102. energy
103. energy management
104. energy absorption
105. energy access
106. energy acquis
107. energy and carbon balance
108. energy and cost savings
109. energy and East and Central Europe
110. energy and society
111. energy as generator of the dynamics
112. energy assessment
113. energy audit
114. energy autarky
115. energy autonomy
116. energy balance
117. energy balancing
118. energy barrier
119. energy buildings
120. energy calculation for air heating
121. energy calculations
122. energy calculator
123. energy cascade
124. energy challenges
125. energy class
126. energy communities
127. energy community
128. energy competitiveness
129. energy conservation
130. energy consumption
131. energy consumption of construction operations
132. energy contracting
133. energy control
134. energy control unit (ECU)
135. energy conversion
136. energy conversion efficiency
137. energy cost
138. energy crisis
139. energy demand
140. energy detection
141. energy dispersive spectroscopy
142. energy dispersive x-ray spectroscopy
143. energy dissipation
144. energy districts
145. energy efficiency
146. energy efficiency (EE)
147. energy efficiency and saving
148. Energy Efficiency Design Index (EEDI)
149. energy efficiency directive
150. Energy efficiency measurement
151. energy efficiency measures
152. energy efficiency of AHU
153. energy efficiency regulations
154. energy efficient
155. energy efficient buildings
156. energy engineering
157. energy exchange
158. energy expenditure
159. Energy flexibility
160. energy flexibility indices
161. energy flow
162. energy flux
163. energy for free
164. energy forecast
165. energy forecasting
166. energy futures
167. energy generation
168. energy grid
169. energy growth
170. energy harvesting
171. energy informatics
172. energy integration
173. energy internet
174. energy laboratory
175. energy levels
176. energy localization
177. Energy loss
178. energy losses
179. energy management
180. Energy Management in Microgrid
181. energy management strategies (EMS)
182. energy market
183. energy market in the EU
184. energy markets
185. energy metabolism
186. energy modeling
187. energy modelling
188. energy models
189. energy optimization
190. energy perfomance of buildings
191. energy performance
192. energy performance building directive (EPBD)
193. energy performance certificate
194. energy performance certificates (EPC)
195. energy performance gap
196. energy performance minimum requirements
197. energy performance of buildings
198. Energy Performance of Buildings Directive (EBPD)
199. energy performance of buildings directive (EPBD)
200. energy piles
201. energy planning
202. energy policy
203. energy politics
204. energy potential
205. energy poverty
206. energy prediction
207. energy prices
208. energy pricing
209. energy priorities in Europe
210. energy production
211. energy recovery
212. energy reduction
213. energy refurbishment
214. energy regulation
215. energy related
216. energy renovation
217. energy renovations
218. energy resilience
219. energy resources
220. energy retrofit
221. energy retrofitting
222. energy roadmap
223. energy router
224. energy saving
225. energy saving cars
226. energy saving device (ESD)
227. energy saving devices
228. energy saving measures
229. energy savings
230. energy science and technology
231. energy sector
232. energy security
233. energy security indicator
234. energy simulation
235. energy simulation software
236. energy simulations
237. energy stability
238. energy states
239. energy storage
240. energy storage device
241. energy storage devices
242. energy storage dimensioning
243. energy supplies
244. energy sustainability
245. energy targets
246. energy technologies
247. energy trading
248. energy transaction
249. energy transfer
250. energy transition
251. energy use
252. energy use baseline
253. energy use prediction
254. energy use reduction
255. energy yield
256. energy yield prediction
257. energy-as-a-service
258. energy-awareness
259. Energy-based evaluation
260. energy-efficiency
261. energy-efficient buildings
262. energy-efficient computing
263. energy-efficient stimulation
264. energy-renovation
265. Eu Energy Law
266. European energy policy
267. expeditionary energy
268. final energy
269. free energy principle
270. Free-energy principle
271. generation of electric energy
272. geothermal energy
273. geothermal energy recovery
274. green and energy efficient housing
275. green energy
276. heating and cooling energy cost
277. heating and electricity energy use normalization
278. heating energy use
279. Helmholtz free energy
280. high energy ballmilling
281. high energy milled activation
282. high energy milling
283. High energy physics
284. high penetration of renewable energy sources (RESs)
285. high-energy astrophysics
286. high-energy ball milling
287. high-energy milling
288. high-penetration renewable energy
289. high-penetration renewable energy sources (RESs)
290. home energy management
291. hybrid energy source
292. hydrogen energy storage
293. implications of energy data
294. indoor and outdoor energy harvesting
295. indoor energy harvesting
296. innovative energy services
297. integrated energy service provider (IESP)
298. intermolecular interaction energy
299. internet of things (IoT) for renewable energy
300. intracellular energy unit
301. joint energy-spectral efficiency (ESE)
302. kinetic energy
303. Laser energy density
304. laser-assisted directed energy deposition
305. levelized cost of energy
306. levelized cost of energy (LCOE)
307. linear free energy (LFE) relationships
308. local energy communities
309. local energy community
310. local energy market
311. low energy building
312. low energy buildings
313. low energy house
314. low energy office building
315. low energy renovation
316. low-energy building
317. low-energy buildings
318. Marine renewable energy
319. maritime energy contract
320. mechanical engineering and energy technology
321. minimum energy
322. multi-energy microgrid
323. national energy policy
324. near zero energy building
325. nearly zero energy buildings (nZEB)
326. nearly zero-energy building
327. Nearly Zero-Energy Buildings
328. nearly-zero energy buildings
329. nearly-zero energy-building
330. net zero energy buildings
331. net-zero energy
332. nexus water-energy-food
333. nonlinear energy sink (NES)
334. nZEB deep energy renovation
335. nuclear energy
336. offshore wind energy
337. off-shore wind energy
338. operational energy
339. optimal energy management
340. optimal multi-energy flows
341. passive energy storage
342. PED – positive energy district
343. peer-to-peer energy trading
344. PEN – positive energy neighbourhood
345. PES (primary energy savings)
346. photovoltaic energy
347. photovoltaic energy converter
348. photovoltaic energy converters
349. photovoltaic energy forecasting
350. piezoelectric energy harvesting
351. plowing energy
352. plus energy house
353. positive energy districts design
354. potential energy barrier
355. potential energy surface
356. potential energy surfaces
357. power electronic interfaces for renewable energy sources
358. primary energy
359. primary energy efficiency
360. primary energy factor (PEF)
361. primary energy factors
362. primary energy indicator
363. primary energy indicators
364. primary energy requirement
365. primary energy use
366. pumped-hydro energy storage
367. PV energy storage
368. Q42 - alternative energy sources
369. quantum-enhanced secure and energy-efficient routing (QSEER) protocol
370. reactive energy
371. real energy use
372. renewable energy
373. Renewable energy certificates (RECs)
374. renewable energy contribution
375. Renewable energy generation
376. renewable energy integration
377. Renewable energy optimization in buildings
378. renewable energy ratio
379. renewable energy recovery
380. renewable energy resources
381. Renewable energy source
382. renewable energy source (RES)
383. renewable energy sources
384. renewable energy sources (RES)
385. Renewable energy sources (RESs)
386. renewable energy storage
387. renewable energy technology
388. renewable-energy policy
389. residential energy
390. residential energy management
391. residential energy storage
392. RF energy
393. seasonal energy imbalance
394. ship energy efficiency
395. short-term energy management
396. simulation of energy consumption
397. single energy market
398. sliding energy
399. smart energy
400. smart energy platform
401. smart energy services
402. solar energy
403. solar energy materials
404. solar energy utilization
405. solar photovoltaic energy
406. solar PV energy
407. specific energy
408. specific energy consumption
409. specific energy model
410. Storable chemical energy
411. strategic energy planning
412. superconducting magnetic energy storage (SMES)
413. sustainable energy management
414. sustainable energy
415. Zero energy
416. zero-energy buildings
417. targeted energy transfer (TET)
418. Themal energy storage
419. thermal energy
420. thermal energy storage
421. thermal energy storage (TES)
422. thermochemical energy storage
423. third energy package
424. Time of Use energy price
425. transactive energy
426. tumor energy metabolism
427. Urban Building Energy Modeling (UBEM)
428. urban building energy modelling
429. variability of energy flux
430. variability of renewable energy
431. variable renewable energy (VRE)
432. variable wind and solar energy
433. waste to energy
434. wave energy
435. wave energy converter (WEC)
436. Wave energy converters
437. wave energy flux
438. wave energy resource assessment
439. vertical kinetic energy variability
440. wide band gap energy
441. wind energy
442. wind energy farms
443. wind energy forecast errors
444. wind energy generation
445. wind energy production
446. virtual energy storage
447. active distribution system
448. Adaptive network-based fuzzy inference system (ANFIS)
449. Adaptive virtual inertia system
450. advanced driver assistance system
451. agri-food system
452. air transportation system
453. aircraft electric power system
454. AIS navigation tracking system
455. algebraic weak factorisation system
456. allocation system
457. Android (operating system)
458. anomaly detection for system logs
459. antilock braking system
460. anti-lock braking system
461. anti–lock braking system
462. ascending hierarchical grid system
463. asynchronous system
464. Automated Bonding Evaluation System
465. Automated placement system
466. Automatic identification system
467. automatic identification system (AIS)
468. autonomic nervous system
469. Autonomous Identification System (AIS)
470. Autonomous Maritime Surveillance System (AMSS)
471. autonomous parking system
472. autonomous system
473. ball and beam system
474. Ballast water treatment system
475. banking system
476. barotrauma detection system
477. Barotrauma detection system sensors
478. Battery management system
479. Battery system
480. BeiDou Navigation Satellite System (BDS)
481. bicycle-sharing system
482. Biological system modeling
483. biological system modelling
484. biosensing system
485. bipolar electrode system
486. Board and System Test
487. braking system
488. bridge management system
489. Building Automation and Control System (BACS)
490. building service system
491. Business School Impact System (BSIS)
492. CAD/CAM system
493. Cambrian-Vendian aquifer system
494. capture system
495. car frontal protection system
496. carbonate system
497. cardiovascular system
498. cartesian system model
499. catching-up innovation system
500. CAVE-like system
501. cell broadcast system (CBS)
502. cell management system
503. central nervous system
504. central nervous system lymphoma
505. centralized control system
506. chaotic system
507. city transport system
508. climate and earth system modelling
509. closed distribution system
510. cloud- and AI-based system
511. cloud manufacturing operating system
512. cloud operating system
513. coastal forecasting system
514. cognitive system engineering
515. collision alert system
516. communication system security
517. complex adaptive system
518. comprehensive system of economic security
519. compressed air system
520. computer algebra system
521. condition monitoring system
522. consumer power system
523. context aware recommender system (CARS)
524. context-aware recommender system
525. control system
526. control system analysis
527. control system design
528. control system for grid integration
529. control system stability
530. control system synthesis
531. COOR system
532. corporate performance monitoring system
533. court information system
534. cyber physical power system (CPPS)
535. Cyber Physical Production System
536. cyber physical social system
537. cyber physical system
538. cyber-physical social system (CPSS)
539. cyberphysical system
540. cyber-physical system
541. Cyber-Physical System (CPS)
542. cyber-physical system logistic robot
543. cyber-physical system security
544. data acquisition system
545. database management system
546. database management system (DBMS)
547. decision support system
548. decision support system (DSS)
549. decision support system for housing
550. design system
551. DHW influence on DH system dimensioning
552. digital decision support system
553. Digital decision support system (DDSS)
554. digital Last Planner System whiteboard
555. disaster relief system
556. discrete-time system
557. distributed system
558. distribution system
559. distribution system modelling
560. diverse system
561. document management system
562. double interceptor system
563. double-cabled system
564. drive system
565. dynamic system
566. Earth observing system
567. earth system modelling
568. earth system study
569. efficiency of flywheel storage system
570. Egyptian power system
571. e-Health system
572. electric power storage system
573. electric power system
574. electric power system control
575. electric power system stability
576. electric vehicle propulsion drive system
577. electrical storage system
578. electricity system
579. electricity-heating system
580. electrode-tissue system
581. electro-hydraulic servo-system
582. Electronic Education System Model-2
583. Electronic record management system
584. embedded system
585. end-to-end model-based system
586. environmental management system
587. e-permitting system
588. e-state system
589. Estonian accounting system
590. Estonian National Health Information System
591. estonian national health information system (ENHIS)
592. Estonian nationwide Health Information System (EHIS)
593. EU regulatory system for medicines
594. European arrest warrant system (EAW)
595. European legal system
596. European Vertical Reference System (EVRS)
597. exchange rate system
598. exhaust system
599. experimental system
600. External Thermal Insulation Composite System
601. External Thermal Insulation Composite System (ETICS)
602. external thermal insulation composite system ETICS
603. factorization system
604. faults in power system
605. financial system
606. fixed exchange rate system
607. flexible manufacturing system
608. floor heating system
609. flow system
610. flow-trough system
611. fluid power feeding system with a pneumo-hydraulic accumulator
612. fluid power system
613. food system
614. four-electrode system
615. four-wire system
616. fractional singular system
617. fractional-order system
618. GaN system
619. Gasifier system
620. Geographic Information System (GIS)
621. geographical information system
622. Georgian legal system
623. Global Maritime Distress and Safety system (GMDSS)
624. global ocean observing system
625. Global Positioning System (GPS)
626. GNU/Linux System Hardening
627. green manufacturing system
628. grid-connected PV system
629. habitation system
630. harmonized system taxonomy
631. health care system
632. health system
633. heat emission system
634. heating system
635. height system realization
636. height system unification
637. human factors in vehicular system
638. human-machine system
639. HVAC system
640. hybrid power system
641. hydraulic system
642. IEEE 9 bus test system
643. immune system
644. influence on DH system dimensioning
645. information processing system
646. information system
647. Information System Authority (RIA)
648. inlet system
649. innovation system
650. in-system programming
651. integrated electricity and natural gas system (IEGS)
652. Integrated navigation system
653. integrated programming system
654. integrated system of performance analysis
655. integrated waste management system
656. intelligent decision support system
657. intelligent transport system
658. Interconnected power system
659. international system
660. intrusion detection system (IDS)
661. intrusion response system
662. INVAR neuromarketing method and system
663. IT system landscapes
664. IT system maturity
665. ITS (Intelligent Transportation System)
666. Kanban (pull system)
667. Knowledge management system
668. knowledge-based system
669. laboratory inforation management system (LIMS)
670. laboratory information management system (LIMS)
671. large-scale district heating system
672. Last Planner System
673. Last Planner System (LPS)
674. lean manufacturing system
675. learning management system
676. leasing reporting system
677. legal system
678. library system
679. linear control system
680. lithium batteries and power system modeling
681. local power supply system
682. low system strength
683. low-level control system transportation
684. lowpower embedded system
685. magnetic levitation system
686. manufacturing execution system
687. manufacturing execution system (MES)
688. marine carbon dioxide system
689. Maxwell system
690. meandering river system
691. measuring system
692. mechanical ventilation system
693. mechatronics system control
694. medical decision support system (MDSS)
695. medical system
696. MET system in Estonia
697. meta-system
698. Milliken-Taylor system near zero
699. mixed surfactant system
700. mixed-critical system
701. mobile cyber-physical system
702. mobile information system
703. Modern power system
704. modern system-on-chips (SoCs)
705. modified Peregrine system
706. modular system
707. monetary system
708. monitoring system
709. motion capture system
710. motor-drive system
711. multi agent system
712. multi-agent system
713. multi-agent system (MAS)
714. Multi-area coordination of integrated electricity and natural gas transmission system
715. multi-machine power system
716. multiple-input multiple output system
717. multi-port system
718. multi-processor system-on-chip
719. multi-processor system-on-chips (MPSoCs)
720. multi-pump system
721. multirate system
722. multi-system interactions
723. Muti-Processor System on Chip (MPSoC)
724. national innovation system
725. natural ventilation system
726. navigation system
727. nervous system
728. Nervous system diseases
729. network intrusion detection system
730. neuro-fuzzy system
731. news recommendation system
732. nonlinear control system
733. nonlinear dynamic system
734. nonlinear system
735. nonnegative solution to the system of linear equations
736. normalized system
737. normalized system (NS)
738. occupational health and safety management system
739. offer management system
740. on-site PV system
741. operating system
742. optical system
743. optoelectronic system
744. orthographic system modeling
745. performance management system
746. performance measurement system
747. photovoltaic system
748. photovoltaic system (PV)
749. Pichia pastoris expression system
750. planning support system (PSS)
751. port community system
752. portable medical system
753. portable system
754. power distribution system
755. power system
756. power system analysis computing
757. power system control
758. power system dynamics
759. power system economics
760. power system faults
761. power system harmonics
762. power system management
763. power system measurements
764. power system modeling
765. power system modelling
766. power system operation
767. power system parameter estimation
768. power system planning
769. power system protection
770. power system reliability
771. power system resilience
772. power system restoration
773. power system security
774. power system simulation
775. power system simulations
776. Power system stabilizer (PSS)
777. power system stability
778. power system transient stability
779. power-to-gas based storage system
780. powertrain system
781. processing system
782. procurement system structure
783. production monitoring system
784. production monitoring system (PLM)
785. production monitoring system (PMS)
786. production performance evaluation system
787. programmable system-on-chip
788. propeller and propulsion system
789. propulsion drive system
790. PV system
791. PV System 200kW
792. PV/Battery system
793. quality system
794. radiator heating system
795. rail transit system
796. railway system modelling
797. rainwater drainage system
798. rating system
799. Real interconnected power system
800. real-time tariff system
801. recommendation system
802. recommender system
803. reconfigurable manufacturing system
804. renewable-based hybrid system
805. renin–angiotensin system
806. renin-angiotensin system inhibitors
807. reporting system
808. research-funding system
809. rigorous formal diagrammatic system
810. river system
811. robot operating system
812. Robot Operating System (ROS)
813. rule system
814. safety management system
815. safety-critical system
816. sample collection system
817. Satellite Autonomous Identification System (SAIS)
818. SCADA system
819. self learning system
820. servo system
821. shear wall system
822. Shock system
823. single phase system
824. single-phase system
825. single-stage system
826. singular system
827. SIS II (Schengen Information System II)
828. Si-SiO2 system
829. smart drainage system
830. smart waste management system
831. social system theory
832. socio-economic system change
833. sociotechnical system
834. socio-technical system
835. Solar tracking system
836. spread and development of new policy instruments (environmental taxes and charges system)
837. standards-based classfication system
838. stochastic port-Hamiltonian system
839. storage system
840. support system
841. suspension system
842. sustainable urban drainage system
843. system
844. system analysis
845. system analysis and design
846. system approach
847. system architecture
848. system architectures
849. system calls
850. system catalog
851. system Cu-Al2O3
852. system design
853. system dynamics
854. system engineering
855. system evaluation
856. system flexibility
857. system GMM
858. system identification
859. system integrated analysis
860. system integration
861. system level
862. system level hazards
863. system level simulation
864. system level test
865. system losses
866. system modeling
867. system monitoring
868. system of branded automotive service
869. system of concept
870. system of concepts
871. system of economic security
872. system of linear inequalities
873. system of systems
874. system operator
875. system optimization
876. system performance
877. system planning level
878. system protection schemes
879. system reliability
880. system restoration
881. system robustness
882. system security
883. system stabilization
884. system stability
885. system studies
886. system testing
887. system theory
888. system thinking
889. system throughput
890. system Validation
891. system vulnerability
892. system-level analysis
893. system-level evaluation
894. system-on-chip
895. system-to-software integrity
896. technological innovation system (TIS)
897. technological system
898. tetrapolar electrode system
899. Thermal Insulation Composite System (ETICS)
900. thermal management system
901. thin-layer rendering system
902. three-pillar system
903. TLC-antioxidant system
904. touch-free system design
905. Toyota production system
906. traffic information system (TIS)
907. transition system
908. transmission system
909. transmission system operation
910. transmission system operator
911. transmission system operator (TSO)
912. transmission System Security
913. transport system efficiency
914. two-electrode system
915. UN system
916. underfloor cooling system
917. Unified Patent Litigation System (UPLS)
918. unknown system
919. urban drainage system
920. urban drainage system modeling
921. urban drainage system modelling
922. value system
923. value-system
924. variable air volume system
925. warning system
926. vascular system
927. water distribution system
928. water distribution system modelling
929. water tank system
930. WC-Co system
931. ventilation system
932. VIS (Visa Information System)
933. workflow management system
934. 1 kV system
935. recommender system
936. 'Smart House' System

1. cell broadcast system (CBS)

energy system (võtmesõna)

teaviku laadid

võtmesõna 936

märksõna 4

TTÜ märksõna 1