采用电器互锁自动反馈，电梯主电源无需要串入本装置。

The device makes the main supply need not connect to it because of its using electronic interlock.

youdao

采用电器互锁自动反馈，电梯主电源无需要串入本装置。

The device makes the main supply need not connect to it because of its using electronic interlock.

youdao