{HEAD ~ The particular grades} of PET and LCP within {TAIL ~ these tests} were grouped for comparison as examples 1 5, 6 9, 10 12, and 13 16 
within
{ HEAD ~ The particular grades } of PET and LCP within { TAIL ~ these tests } were grouped for comparison as examples 1 5 , 6 9 , 10 12 , and 13 16
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH