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