double-pole double-throw switch

进出口行业... ... double-pole cutout 双极断路器 double-pole double-throw switch 双刀双掷开关 double-pole fuse 双极熔断器 ...

航海及海运... ... double-pole cut-out 双极断路器 double-pole double-throw switch 双刀双投开关 double-pole fuse 双极熔断器 ...

... ) two-pole switch 双极开关 ) double-pole double-throw switch 双极双投开关 ) photo electric switch 光电式开关掣 ...