switch means coupled to {HEAD ~ a source} of {TAIL ~ electrical energy} and to said pump for selectively energizing said pump, said switch means including: 
of
switch means coupled to { HEAD ~ a source } of { TAIL ~ electrical energy } and to said pump for selectively energizing said pump , said switch means including :
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH