{HEAD ~ Compressed hydrate forming gas} is combined in {TAIL ~ a pipe} with the liquid water under locally supercooled conditions 
is combined in
{ HEAD ~ Compressed hydrate forming gas } is combined in { TAIL ~ a pipe } with the liquid water under locally supercooled conditions
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH