手动操作时，可显示所有输入，输出接点于操作界面上，维修方便快速。

Manual operation, it can display all input and output contacts on the user interface, the service quickly and easily.

youdao

手动操作时，可显示所有输入，输出接点于操作界面上，维修方便快速。

Manual operation, it can display all input and output contacts on the user interface, the service quickly and easily.

youdao