Air is bled from the compressor of a gas turbine engine and it is led to holes in the shanks of turbine blades, so as to cool {HEAD ~ the interiors} of {TAIL ~ the blades} during operation of the engine 
Air is bled from the compressor of a gas turbine engine and it is led to holes in the shanks of turbine blades , so as to cool { HEAD ~ the interiors } of { TAIL ~ the blades } during operation of the engine
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH 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 TAIL OTH OTH OTH OTH OTH