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| 自保持电路; 联锁电路; 强制同步电路; 锁定电路; 阻塞电路 | |||
| 闭锁电路; 闭锁系统; 闭塞电路 | |||
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схема блокировки : 5 phrases in 1 subject |
| General | 5 |
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