signal : 431 phrases in 33 subjects |
Acoustics | 1 |
Acridology | 1 |
Antennas and waveguides | 1 |
Automatic control | 13 |
Biotechnology | 1 |
Electric machinery | 1 |
Electrical engineering | 1 |
Electronics | 29 |
Entomology | 1 |
Fishery fishing industry | 3 |
General | 1 |
Genetics | 3 |
International Monetary Fund | 1 |
Isolation | 1 |
Laboratory equipment | 1 |
Lighting other than cinema | 8 |
Magnetics | 6 |
Microsoft | 4 |
Oil / petroleum | 1 |
Piezoelectric crystals | 2 |
Power lines | 36 |
Power system protection | 16 |
Radio | 76 |
Radiobiology | 2 |
Rail transport | 90 |
Remote sensing | 1 |
Semiconductors | 2 |
Sound recording | 4 |
Telecommunications | 52 |
Telegraphy | 57 |
Telephony | 3 |
Vacuum tubes | 7 |
Video recording | 5 |