a plunger assembly comprising {HEAD ~ a plunger member} and {TAIL ~ a plunger plate} slidably disposed within said barrel assembly 
a plunger assembly comprising { HEAD ~ a plunger member } and { TAIL ~ a plunger plate } slidably disposed within said barrel assembly
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH