{TAIL ~ A gas turbine engine} 1 wherein said lands are adapted for rotation by forming them integrally with upstream face of {HEAD ~ disc} 
{ TAIL ~ A gas turbine engine } 1 wherein said lands are adapted for rotation by forming them integrally with upstream face of { HEAD ~ disc }
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD