Because the electricity wastage is heavy, once the controlling system take places malfunctions as electricity cut, the state of the relay can't last, then the switch state will be self-changed.
电耗大，一旦控制系统发生断电等故障，继电器的状态无法维持，电器的开关状态就会自动改变。
Because the electricity wastage is heavy, once the controlling system take places malfunctions as electricity cut, the state of the relay can't last, then the switch state will be self-changed.
电耗大，一旦控制系统发生断电等故障，继电器的状态无法维持，电器的开关状态就会自动改变。
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