???? ????
亚洲青涩在线,国产日韩欧美中文,在线精品亚洲国产,无码乱人伦一区二区亚洲一,国产精品丝袜在线,国产一区二区精品高清在线观看,婷婷五月在线,中文字幕2区The General Institute of Machinery Group independently develops and produces various engineering materials, including high quality welding materials, green surface protection materials, advanced die materials and composite materials.
The Group independently develops and produces a series of key parts, including high-end precision castings, gear transmission units, precision forming parts and so on.
The General Machinery Institute Group has been engaged in foundry, welding and cutting, plastic forming, heat treatment, surface treatment and other technical fields for many years. It can provide relevant technical services and equipment.
China Academy of Machinery Science and Technology (CAM), founded in 1956, is...
Copyright China Academy of Machinery Science & Technology Support:xinocheng