 |
| |||
| installation à batterie centrale | |||
| installation téléphonique; système téléphonique | |||
|
Telephone System : 62 phrases in 10 subjects |
| Automated equipment | 1 |
| Aviation | 3 |
| Communications | 41 |
| Electronics | 1 |
| General | 1 |
| Life sciences | 1 |
| Medical appliances | 1 |
| Obsolete / dated | 1 |
| Telecommunications | 11 |
| Telephony | 1 |