A vertical pipe member is adapted to receive {TAIL ~ a liquid gas mixture} having gas bubbles of {HEAD ~ larger diameter} therein 
A vertical pipe member is adapted to receive { TAIL ~ a liquid gas mixture } having gas bubbles of { HEAD ~ larger diameter } therein
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH