A cup shaped closure member 52 surrounds the drive member 44, and abuts {HEAD ~ a flange} 54 of {TAIL ~ that drive member} 
of
A cup shaped closure member 52 surrounds the drive member 44 , and abuts { HEAD ~ a flange } 54 of { TAIL ~ that drive member }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL