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