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