{HEAD ~ Electric timer} with {TAIL ~ program carrier} switchable from a short term to a long term program 
with
{ HEAD ~ Electric timer } with { TAIL ~ program carrier } switchable from a short term to a long term program
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH