A plurality of annular grooves are formed in the inside wall of the cylinder, adjacent the end opposite {HEAD ~ the needle end} of {TAIL ~ the cylinder} 
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A plurality of annular grooves are formed in the inside wall of the cylinder , adjacent the end opposite { HEAD ~ the needle end } of { TAIL ~ the cylinder }
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 HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL