国色天香手机视频免费网|汤唯色戒床上未删减版|91视频大全|在线免费成人,不忠未删减完整版电影,久久性天堂,伊伊亚洲综合人网777

Casus Products>> Casus

  The G10B33 produced by XINGTAI STEEL is mainly used in the production of grade 10.9 high - strength fasteners. The product has stable chemical composition, high surface quality,small decarburization layer, low original hardness of wire rod, high strength after heat treatment and good hardenability. An automobile main engine factory uses the material to produce bolts on the truck. reflecting the product has good hardenability, stable performance and low cracking rate in cold heading.