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