The shim is then formed to include a feature on its surface which complements {HEAD ~ the surface profile} of {TAIL ~ the assembly surface} 
of
The shim is then formed to include a feature on its surface which complements { HEAD ~ the surface profile } of { TAIL ~ the assembly surface }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL