{HEAD ~ The diaphragm} floats freely above {TAIL ~ the generally flat top} of the dome, not in any significant way clamped, pinched or held against the truncated dome shaped valve seat 
floats freely above
{ HEAD ~ The diaphragm } floats freely above { TAIL ~ the generally flat top } of the dome , not in any significant way clamped , pinched or held against the truncated dome shaped valve seat
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL 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