电磁电路和时间预置电路平行设置，两者通过打击按钮相连。

The electromagnetic circuit and the time presetting circuit are arranged in parallel and connected by the hitting button.

youdao

电磁电路和时间预置电路平行设置，两者通过打击按钮相连。

The electromagnetic circuit and the time presetting circuit are arranged in parallel and connected by the hitting button.

youdao