{HEAD ~ A more specific object} of {TAIL ~ the present invention} is to provide a bi directional flow control valve with substantially identical flow control characteristics in opposite flow directions 
of
{ HEAD ~ A more specific object } of { TAIL ~ the present invention } is to provide a bi directional flow control valve with substantially identical flow control characteristics in opposite flow directions
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL 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