In this way, {HEAD ~ the stream} of {TAIL ~ bubbles} is essentially continuous since one dip ring is raised into the air stream as the other is lowered 
In this way , { HEAD ~ the stream } of { TAIL ~ bubbles } is essentially continuous since one dip ring is raised into the air stream as the other is lowered
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH