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