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Rajnath Singh congratulates DRDO on developing single crystal blades for h
Updated : 5 years ago IST
New Delhi [India], April 26 (ANI): The Defence Research and Development Organisation (DRDO) has developed a single crystal blades technology and has supplied 60 number of these blades to Hindustan Aeronautics Limited (HAL) as part of their indigenous helicopter development program for helico
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