For example, {HEAD ~ a slot} could be provided on {TAIL ~ the shaft}, and slot engaging members could be provided on the disc 
provided on
For example , { HEAD ~ a slot } could be provided on { TAIL ~ the shaft } , and slot engaging members could be provided on the disc
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH