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