single-phase current source 単相电流源
single-phase current locomotive 单相电流机车
single phase current locomotive 单相机车
single phase alternating current 单相交流 ; 单相交流电
Single-phase Alternating Current 单相交流电
single-phase over-current relay 单相过电流继电器
alternating current single phase 交流电单相供电
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