国产免费高清在线 , a视频免费观看 , 云端之上电影完整版在线观看 , 天梯电影在线观看完整版,www.九色,97人人爱人人,韩国国产在线

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.