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| |||
| holding circuit; retaining circuit; sustain circuit | |||
| lock-out circuit | |||
| hold circuit; lockout circuit; stick circuit | |||
| |||
| hold circuit | |||
|
保 持 电路 : 28 phrases in 11 subjects |
| Air defense | 1 |
| Communications | 2 |
| Electric machinery | 1 |
| Electronics | 3 |
| General | 1 |
| Mathematics | 1 |
| Oil / petroleum | 2 |
| Shipbuilding | 1 |
| Space | 7 |
| Technology | 5 |
| Telecommunications | 4 |
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