... lock on circuit 强制同步电路 lock-out circuit 闭塞电路 ground track lock circuit 轨道电路控制的锁闭电路 ...
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Based on discussion on several common elevator door lock circuits with software, this paper points out some hidden peril of the accident in such circuits, and designs a circuit using PLC.
常见的电梯门锁安全电路中，门锁继电器在多种情况下都可能产生误动作，存在事故隐患。
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