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Combat Vehicles Research and Development Establishment is a laboratory of the Defence Research and Development Organisation. which is situated  in Avadi,  Chennai, India. It is the main DRDO lab mainly intricate  in the development of Armoured fighting vehicles, Tanks, Automotive electronics and many other. DRDO HIRES b.tech. b.e graduates engineers to the position for scientist B position. students need to appear in gate exam while at final year of b.tech or after completing b.tech. gate exam conducts once a year. scientist B engineers works for different research and development projects of DRDO.