{TAIL ~ Such positioning} can be accomplished by providing {HEAD ~ a plurality} of unequally spaced key slots or the like in the disc, by providing a single key or spline on the shaft for engaging one of the key slots 
{ TAIL ~ Such positioning } can be accomplished by providing { HEAD ~ a plurality } of unequally spaced key slots or the like in the disc , by providing a single key or spline on the shaft for engaging one of the key slots
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH