{HEAD ~ The coatings} are simultaneously removed from {TAIL ~ the first major surface} with the first grinding apparatus from the second major surface with the second grinding apparatus 
are simultaneously removed from
{ HEAD ~ The coatings } are simultaneously removed from { TAIL ~ the first major surface } with the first grinding apparatus from the second major surface with the second grinding apparatus
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH