三级片a片无码_蜜乳AV成人电影_丝袜足交视频在线_日韩精品中文字幕亚洲专区腿精_安徽搡BBBB槡BBBB_欧美日B操B_非洲AV成人无码久久精品_av尤物_www.亚洲黄_WWWWWW美国黄片_蜜乳av影视_久久久亚洲成人AV无码电影_A片免费看在线不卡_国产无码8区_日屄福利视频

　　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.