{HEAD ~ a flow metering valve} in {TAIL ~ said metering cavity} having a tapered stem extending into said interconnecting passage and controlling flow, with the pressure drop from upstream to downstream of said metering valve increasing with increase in flow, said flow metering valve being movable in and sealing against said bore on the opposite side of said inlet passage and said first by pass conduit from said end wall, and adjustable as to position in said metering valve cavity, 
{ HEAD ~ a flow metering valve } in { TAIL ~ said metering cavity } having a tapered stem extending into said interconnecting passage and controlling flow , with the pressure drop from upstream to downstream of said metering valve increasing with increase in flow , said flow metering valve being movable in and sealing against said bore on the opposite side of said inlet passage and said first by pass conduit from said end wall , and adjustable as to position in said metering valve cavity ,
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