The diaphragm is substantially cylindrical in configuration, and has its one axial end connected to the housing while the other end is outwardly folded back upon itself toward said one end, with {HEAD ~ an inner periphery} which is located toward {TAIL ~ the other end} beyond the folded end being fitted around the outer peripheral surface of the piston in close contact therewith 
is located toward
The diaphragm is substantially cylindrical in configuration , and has its one axial end connected to the housing while the other end is outwardly folded back upon itself toward said one end , with { HEAD ~ an inner periphery } which is located toward { TAIL ~ the other end } beyond the folded end being fitted around the outer peripheral surface of the piston in close contact therewith
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