{HEAD ~ The opposite side} of {TAIL ~ that same material} and the other metal plate mutually cooperate to provide complementary centering means 
of
{ HEAD ~ The opposite side } of { TAIL ~ that same material } and the other metal plate mutually cooperate to provide complementary centering means
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