 |
| |||
| control circuit; test circuit | |||
| hold circuit | |||
| pilot wire circuit (со вспомогательными проводами); pilot wire circuit (со вспомогательными проводами) | |||
| observation circuit | |||
| watchdog circuit | |||
| monitoring circuit; holding circuit (в телефонии); pilot circuit | |||
| holding circuit | |||
| checking circuit; proving circuit; supervisory circuit | |||
| surveyor chain | |||
| |||
| control circuits | |||
| контрольная цепь: 9 phrases in 5 subjects |
| Medical appliances | 1 |
| Military | 4 |
| Oil / petroleum | 2 |
| Production | 1 |
| Technology | 1 |