67.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。同步电机信号线被绞断了。

He could type faster and more quietly on the electric typewriter, but he missed the tinkling bell on the manual typewriter that signaled a new line.

他可以在电动打字机上打字更快、更安静，但他错过了手动打字机上表示新行的铃声。