{HEAD ~ An improved plunger lift mechanism} comprises {TAIL ~ an internal hollow body} having bypass orifices that, when exposed, allow fluid to pass through during plunger descent in a downhole tube to the bottom of a production well 
comprises
{ HEAD ~ An improved plunger lift mechanism } comprises { TAIL ~ an internal hollow body } having bypass orifices that , when exposed , allow fluid to pass through during plunger descent in a downhole tube to the bottom of a production well
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH