| |||
señal de control; señal de supervisión | |||
señal de protección |
segnale di controllo : 42 phrases in 8 subjects |
Communications | 13 |
Electronics | 9 |
Information technology | 8 |
Power lines | 2 |
Rail transport | 2 |
Telecommunications | 1 |
Telegraphy | 2 |
Transport | 5 |