【化】 double-throw switch; tow-way switch
both; double; even; twin; two; twofold【化】 dyad【医】 amb-; ambi-; ambo-; bi-; bis-; di-; diplo-; par
cast; flip; pitch; put; throw
on-off; stopcock; switch【计】 disjunctor; S; SW; switch【化】 switch【医】 switch