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