{HEAD ~ The circular, and relative rotation} between {TAIL ~ the circular member} and the shaft is prevented by a plurality of key slots or the like disposed on said circular member and engaging a key, and slot or the like on the shaft 
{ HEAD ~ The circular , and relative rotation } between { TAIL ~ the circular member } and the shaft is prevented by a plurality of key slots or the like disposed on said circular member and engaging a key , and slot or the like on the shaft
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL 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 OTH OTH OTH