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