an inner tube projecting axially into said outer tube in sealed relation to said {HEAD ~ first end} thereof, and having {TAIL ~ a first end} extending past said lateral inlet, 
an inner tube projecting axially into said outer tube in sealed relation to said { HEAD ~ first end } thereof , and having { TAIL ~ a first end } extending past said lateral inlet ,
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH