{HEAD ~ A plunger} mounted in {TAIL ~ the casing} for free vertical movement within a selected range has a disc like foot positioned for free engagement by the diaphragm 
{ HEAD ~ A plunger } mounted in { TAIL ~ the casing } for free vertical movement within a selected range has a disc like foot positioned for free engagement by the diaphragm
HEAD HEAD HEAD HEAD HEAD HEAD REL REL 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