The fixed screw in synchrous motor is not fixed. The antenna motor rotates with synchrous motor. The signal line was broken by the rotation.
同步电机的固定螺丝没有固定，天线电机随同步电机一起转。同步电机的信号线被绞断了。
The fixed screw in synchrous motor is not fixed. The antenna motor rotates with synchrous motor. The signal line was broken by the rotation.
同步电机的固定螺丝没有固定，天线电机随同步电机一起转。同步电机的信号线被绞断了。
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