The assembly 1, wherein the casing and {HEAD ~ the collars} are made of {TAIL ~ composite material} 
are made of
The assembly 1 , wherein the casing and { HEAD ~ the collars } are made of { TAIL ~ composite material }
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL