It is to be noted that {HEAD ~ the above referred respective bolts} also serve as {TAIL ~ a weight} for preventing float up of the air sealing plates and  
serve as
It is to be noted that { HEAD ~ the above referred respective bolts } also serve as { TAIL ~ a weight } for preventing float up of the air sealing plates and
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH