The surfaces of the rotor that are exposed to {HEAD ~ the gases} of combustion are provided with a plurality of {TAIL ~ pockets} 
The surfaces of the rotor that are exposed to { HEAD ~ the gases } of combustion are provided with a plurality of { TAIL ~ pockets }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL