The pump chamber 5 is thus defined by the ring 1, {HEAD ~ the side plate} 2, and {TAIL ~ the diaphragm} 4 
The pump chamber 5 is thus defined by the ring 1 , { HEAD ~ the side plate } 2 , and { TAIL ~ the diaphragm } 4
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH