In {TAIL ~ some embodiments}, {HEAD ~ systems} also include a reset protrusion disposed on a distal end of a flapper shaft connected to the flapper lever 
In { TAIL ~ some embodiments } , { HEAD ~ systems } also include a reset protrusion disposed on a distal end of a flapper shaft connected to the flapper lever
REL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH