A pair of flanges 27, protrude centrally from {HEAD ~ opposed ends} of {TAIL ~ cylindrical valve member 24b} along cylindrical axis C thereof, perpendicular with the longitudinal axis of reservoir 2 
A pair of flanges 27 , protrude centrally from { HEAD ~ opposed ends } of { TAIL ~ cylindrical valve member 24b } along cylindrical axis C thereof , perpendicular with the longitudinal axis of reservoir 2
OTH OTH OTH OTH OTH OTH OTH OTH OTH 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