single pole single throw 单极闸刀开关 ; 单极单投

single pole single throw switch 单刀单投开关

single-pole single-throw 单刀单掷 ; 单极单投 ; 单刀单掷开关 ; 单刀单投

single-pole single throw switch 单极单投开关

single -pole single -throw 单极单投

SPST Single Pole Single Throw 单刀单掷

Single Pole - Single Throw 配置

Single-pole-single-throw switch 单端单掷开关