略語大辞典 [C] 25 SPST single-pole single-throw (switch) 単極単投(スイッチ).single-pole single-throw (switch); a function of a switch that works only between ON and OFF; ref. SPDT(single pole double throw), SP3T(single pole triple-throw); [C:E]. 丸善「略語大辞典」JLogosID : 11860207