双刀双掷 DPDT ; double pole double throw ; Dual Pole Dual Throw

双刀双掷继电器 DPDT

双刀双掷开关继电器 RELAY-DPDT

双刀双面涂布机 twin blade coater

双刀双投开关 double-pole double-throw switch

双刀双投 double-pole double-throw

双重双面刀齿 Duplex spread blade

双单刀双掷 dual SPDT

双极双刀开关 Double pole two way switch