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