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国产精品亚洲一区二区在线观看 ,草草影院发布页,国产午夜福利片在线观看,成人伊人青草久久综合网,成 人 免 费 黄 色,娇小萝被两个黑人用半米长,亚洲精品区二区三区蜜桃,在线不卡免费视频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...
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