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