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