{HEAD ~ The plunger} 214 therefore is moved to the left by the spring 218 due to {TAIL ~ the resulting decrease} of pressure drop across the orifice 228 
{ HEAD ~ The plunger } 214 therefore is moved to the left by the spring 218 due to { TAIL ~ the resulting decrease } of pressure drop across the orifice 228
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH