{HEAD ~ A needle} is positioned on the end of the cylinder and discharges liquid through an opening as {TAIL ~ the plunger} forces the liquid to the bottom of the cylinder 
{ HEAD ~ A needle } is positioned on the end of the cylinder and discharges liquid through an opening as { TAIL ~ the plunger } forces the liquid to the bottom of the cylinder
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH