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1·Contactor can be easily retro-fitting auxiliary contact group, and appropriate combination of thermal relay to protect the load that may have been circuits.

接触器还可方便地加装辅助触头组，和适当的热继电器组合，保护可能发生过负载的电路之用。

2·The paper introduces the method and monitoring result of reliability test research on auxiliary contact of 3TB40 AC contactor.

介绍了3TB40交流接触器辅助触头可靠性试验的方法和试验监测结果。

3·Means need 25a contactor, main contact are three normally open, auxiliary contact is one normally open, control coil voltage is DC 110v, order volume is 20 sets.

表示为25a接触器的主触头为三对常开，辅助触头为一对常开，控制线圈的电压为直流110v，订货数量为20台。