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