Furthermore, {HEAD ~ the same parts} may be expressed with different sizes and {TAIL ~ ratios} in different drawings 
expressed with
Furthermore , { HEAD ~ the same parts } may be expressed with different sizes and { TAIL ~ ratios } in different drawings
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH