{HEAD ~ The assembly} 4, wherein the cam gear teeth are of {TAIL ~ varying shapes} and dimensions 
{ HEAD ~ The assembly } 4 , wherein the cam gear teeth are of { TAIL ~ varying shapes } and dimensions
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH