安全开关可以是一种电子开关，当汽车挂挡后，它断开控制电路。
The safety switch can be an electrical switch that opens the control circuit if the car is in gear.
设备运行的动态检测进一步完善了控制电路，保证设备能安全、可靠运行。
Dynamic testing of equipment has improved control circuit to guarantee safe and reliable operation.
介绍利用交流接触器自制控制电路来控制发电机的停电自动启动和来电自动停车，以确保机房供电安全。
Introduce using alternating contactor automatic control circuit to control the generator which are power on of powering off and stoping to ensure, the generator room to supply electricity safely.
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