The ring is sandwiched between a flange extending from the base and a lower edge of {HEAD ~ the skirt portion} of {TAIL ~ the driving member} 
of
The ring is sandwiched between a flange extending from the base and a lower edge of { HEAD ~ the skirt portion } of { TAIL ~ the driving member }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL