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1. Before 1976  (24)
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Subject 

1. Electricity  (1,033)
2. Physics  (520)
3. Transporting  (473)
4. Performing Operations  (473)
5. Vehicles In General  (403)
6. Conversion Or Distribution Of Electric Power  (371)
7. Generation  (371)
8. Electric Communication Technique  (326)
9. Electrodynamic Brake Systems For Vehicles, In General  (311)
10. Electric Equipment Or Propulsion Of Electrically-Propelledvehicles  (311)
11. Magnetic Suspension Or Levitation For Vehicles  (311)
12. Control Or Regulation Thereof  (218)
13. Conversion Of Dc Or Ac Input Power Into Surge Outputpower  (218)
14. Basic Electronic Circuitry  (215)
15. Code Conversion In General  (189)
16. Decoding  (189)
17. Coding  (189)
18. Basic Electric Elements  (179)
19. Circuit Arrangements Or Systems For Supplying Or Distributingelectric Power  (155)
20. Systems For Storing Electric Energy  (155)
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Language 

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