haodiaocao这里只有精品一,男人午夜网站,国产免费插插插,国产精品欧美激情在线播放,国产成人aa在线视频,国产情侣自拍网站,狠狠色丁香婷婷

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.