the opening of said second outlet in relation to {HEAD ~ the opening} of {TAIL ~ said second inlet} increases with the increase in the displacement of said pressure detecting portion 
the opening of said second outlet in relation to { HEAD ~ the opening } of { TAIL ~ said second inlet } increases with the increase in the displacement of said pressure detecting portion
OTH OTH OTH OTH OTH OTH OTH OTH OTH 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