Ministry of Metallurgical Industry Yanjiao diamond company Metallurgical Industry the Ministry first - China

The company is China Machine Tool Industry Association. Major man-made diamond production and management, and its products .1975 created in May when called Metallurgical Industry, the Ministry of geological campaign headquarters synthetic diamond drill bit plant .1979, .1978, commissioned by the unit in charge Name changes and increased use of product names .1985, and Metallurgical Industry, the Ministry First Geological Survey Institute of Technology prospecting companies merged in February 1988 to a current title.