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