Having read an electrical book. he began to repair the electric fan.
看了一本有关电的书籍后，他开始修理电扇。
This electrical fan doesn't work well. I'll try a new one.
这台电扇不好用，请给我换一台新的。（不是同一台电扇）
Connect fan electrical connector.
连接风扇电气接头。
Alarm output: frequent on or off signal, control exhaust fan, electrical magnetic valve signal.
报警输出：常开常闭信号，控制排风扇，电磁阀信号。
Alarm output: frequent on or off signal, control exhaust fan, electrical magnetic valve signal.
报警输出：常开常闭信号，控制排风扇，电磁阀信号。
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