The structure of the existing open circuit warner is that: the reed switch and the open circuit warning circuit are connected into a section;
现有开路报警器构造是：干簧管与开路报警电路连接为一分体；
The structure of the existing open circuit warner is that: the reed switch and the open circuit warning circuit are connected into a section;
现有开路报警器构造是：干簧管与开路报警电路连接为一分体；
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