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installation à batterie centrale | |||
installation téléphonique; système téléphonique |
telephone system : 61 phrases in 9 subjects |
Aviation | 3 |
Communications | 41 |
Electronics | 1 |
General | 1 |
Life sciences | 1 |
Medical appliances | 1 |
Obsolete / dated | 1 |
Telecommunications | 11 |
Telephony | 1 |