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