The transistor, when fully saturated, could turn a circuiton or off, and then could be used to control an electrical circuit or store information in an electrical circuit.
Introduce using alternating contactor automatic controlcircuit to control the generator which are power on of powering off and stoping to ensure, the generator room to supply electricity safely.
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。
3
Instruments based on the lower limit of two switch-contact device, the pressure to set a signal or when the value of on-offcontrolcircuit for the operating system's automatic control or the use.