Again, switching may be accomplished through {HEAD ~ electro/mechanical devices} such as relays or {TAIL ~ solid state devices} such as SCRs, triacs or MOSFETS 
such as
Again , switching may be accomplished through { HEAD ~ electro / mechanical devices } such as relays or { TAIL ~ solid state devices } such as SCRs , triacs or MOSFETS
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH