【电】 channel reversing swithc
【化】 channel
athwart; contradictorily; counter; disobey; go against; inverse
【医】 contra-
in reverse; on the contrary; turn over
【医】 contra-; re-; trans-
on-off; stopcock; switch
【计】 disjunctor; S; SW; switch
【化】 switch
【医】 switch