double-pole cut-out

航海... ... double-pole contactor 双极接触器 double-pole cut-out 双极断路器 double-pole double-throw switch 双刀双投开关 ...

... double-pole single throw 双刀单掷开关 double-pole cut-out 双极断流器 double-pole double throw switch 双刀双掷开关 ...