double-point double-throw switch

... double-point crank press 双点曲轴压力机 double-point double-throw switch 双刀双掷开关 double-point gear 多点啮合齿轮 ...

三极双投刀开关,trip... ... ) double-point double-throw switch 双刀双投开关 ) double pole single-throw switch 双刀单投开关 ...