{TAIL ~ The cylinder} comprises an open cylindrical passage and includes a needle attached in a conventional manner at {HEAD ~ the proximal end} thereof 
{ TAIL ~ The cylinder } comprises an open cylindrical passage and includes a needle attached in a conventional manner at { HEAD ~ the proximal end } thereof
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH