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