{HEAD ~ The size} of {TAIL ~ discharge cross section} of the nozzle varies through movement of the nozzle parts which respond to pressure created in the switch, without the assistance of elaborate compression springs 
of
{ HEAD ~ The size } of { TAIL ~ discharge cross section } of the nozzle varies through movement of the nozzle parts which respond to pressure created in the switch , without the assistance of elaborate compression springs
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH