manually actuateable and adjustable means for applying air under a predetermined pressure to the side of said piston adjacent said {HEAD ~ rear end} at {TAIL ~ a desired rate} to cause forceful movement of said piston from said rear end to said front end of said tubular member 
at
manually actuateable and adjustable means for applying air under a predetermined pressure to the side of said piston adjacent said { HEAD ~ rear end } at { TAIL ~ a desired rate } to cause forceful movement of said piston from said rear end to said front end of said tubular member
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH