{HEAD ~ Air} is bled from {TAIL ~ the compressor} of 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 
is bled from
{ HEAD ~ Air } is bled from { TAIL ~ the compressor } of 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 REL REL REL 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 OTH OTH OTH OTH OTH