{HEAD ~ The on off state} of switch 56 is controlled by {TAIL ~ switching signals} 57 coupled to a control terminal 58 of switch 56 
is controlled by
{ HEAD ~ The on off state } of switch 56 is controlled by { TAIL ~ switching signals } 57 coupled to a control terminal 58 of switch 56
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH