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