{HEAD ~ a valve seat} between {TAIL ~ said inlet and outlet ports}, wherein said valve seal seals against said seat when said plunger is in said valve closed position and is spaced from said seat when said plunger is in said valve open position 
{ HEAD ~ a valve seat } between { TAIL ~ said inlet and outlet ports } , wherein said valve seal seals against said seat when said plunger is in said valve closed position and is spaced from said seat when said plunger is in said valve open position
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