This arrangement of packing ring segments and holders provides retractable packing which can close relative to {HEAD ~ turbine rotor} 16 with {TAIL ~ a minimum pressure drop} 
with
This arrangement of packing ring segments and holders provides retractable packing which can close relative to { HEAD ~ turbine rotor } 16 with { TAIL ~ a minimum pressure drop }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL