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