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إشارة : 411 phrases in 23 subjects |
Automatic control | 20 |
Cables and cable production | 3 |
Electrical engineering | 2 |
Electricity generation | 1 |
Electronics | 54 |
General | 2 |
Lighting other than cinema | 13 |
Magnetics | 1 |
Mathematics | 1 |
Microsoft | 16 |
Piezoelectric crystals | 2 |
Power lines | 55 |
Power system protection | 12 |
Radio | 55 |
Radiobiology | 4 |
Rail transport | 48 |
Satellite communications | 1 |
Sound recording | 6 |
Telecommunications | 53 |
Telegraphy | 56 |
Telephony | 1 |
Vacuum tubes | 1 |
Video recording | 4 |