said sealing label is removed and {HEAD ~ low density gas} is re injected through {TAIL ~ said hole}; and 
is re injected through
said sealing label is removed and { HEAD ~ low density gas } is re injected through { TAIL ~ said hole } ; and
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH