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

　　The material GSCM435-C made by XINGTAI IRON AND STEEL CORP., LTD is mainly used in car with a magnitude of 12.9 high strength fasteners. This product has good surface quality, smaller decarburization  layer and stable composition.It also possesses high strength,high toughness, wear-resistant corrosion resistance,high temperature resistance and other special characteristics.The customers response that this material has a good hardenability,heat treatment quality is stable,and also with a uniform hardness.