Standard switch entirely suitable for millivolt service on self-energized control circuits of gas fired heating installations.
在燃气加热安装系统的自激控制电路中，整个标准开关适用于毫伏电压。
Standard switch entirely suitable for millivolt service on self-energized control circuits of gas fired heating installations.
在燃气加热安装系统的自激控制电路中，整个标准开关适用于毫伏电压。
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