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système d'intercommunication; système téléphonique à poussoirs; système à clé; intercom m | |||
installation d'intercommunication |
key system : 42 phrases in 12 subjects |
Aviation | 2 |
Communications | 10 |
Finances | 1 |
General | 3 |
Information technology | 10 |
Labor law | 1 |
Microsoft | 1 |
Name of organization | 3 |
Technology | 1 |
Telecommunications | 3 |
Transport | 1 |
United Nations | 6 |