two-way switch

双向门机,double... ... ) bidirectional ventilation door 双向风门 ) two-way switch 双向电门 ) double swing door 双向开门 ...

new ... 双频涡流检测 two frequency eddy current testing 双向转换开关 two-way switch ...

投切开关,fling-cut... ... ) soft switching 软开关投切 ) two-way switch 双投开关 ) single-throw switch 单投开关 ...