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