[电]
single-pole double throw
... single-pole double throw switch 单刀双掷开关 single-pole double throw 单刀双投 single-pole knife switch 单极闸刀开关 ...
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短语
单刀双投开关
single-pole double throw switch
单刀双投式
SPDT
双刀单投开关
double pole single-throw switch
双刀单投
double pole single-throw
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