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segnale sinistro stereofonico |
señal A : 52 phrases in 11 subjects |
Communications | 12 |
Electronics | 17 |
Information technology | 3 |
Natural sciences | 1 |
Power lines | 2 |
Power system protection | 1 |
Rail transport | 2 |
Statistics | 1 |
Telecommunications | 1 |
Telegraphy | 1 |
Transport | 11 |