2046电影完整版未删减云播,日韩视频在线视频,av激情一区二区三区,xxx国产在线,色戒2002电影完整版下载 ,91视频官网,991本久久精品久久久久

Casus Products>> Casus

  The GML40Cr produced by XINGTAI STEEL is mainly used in the production of high-strength fasteners above 10.9 levels. The product has stable chemical composition, high surface quality and small decarburization layer. An automobile main engine factory uses the material to produce outer hexagon bolts for passenger cars. reflecting the product has good hardenability, stable performance and low cracking rate in cold heading.