direct-current control coil
width control coil 调宽线圈 direct-current control coil 直流控制线圈 electrical displacement control coil resistance 电位移控制线圈电阻 ..
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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。
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.
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