After passage through the water, the air is fed into {HEAD ~ the interior} of {TAIL ~ the indoor institution} 
of
After passage through the water , the air is fed into { HEAD ~ the interior } of { TAIL ~ the indoor institution }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL