{HEAD ~ A turbine blade} has {TAIL ~ cooling air passageways} and through the leading edge wall portion which are positionally arranged so as to intersect each other within the wall thickness so as to transmit mechanical stresses into the thicker, non perforated material of the blade aerofoil  
has
{ HEAD ~ A turbine blade } has { TAIL ~ cooling air passageways } and through the leading edge wall portion which are positionally arranged so as to intersect each other within the wall thickness so as to transmit mechanical stresses into the thicker , non perforated material of the blade aerofoil
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH