略語大辞典 [C] 24 SPDT single-pole double-throw (switch) 単極双投(スイッチ). 1回路2接点(スイッチ).single-pole double-throw (switch); a type of switch; ref. SPST(single-pole single throw), SP3T(single-pole triple-throw); [C:E]. 丸善「略語大辞典」JLogosID : 11860111