欧洲精品乱码久久久久蜜桃,72式性无遮挡在线观看视频,夜夜操夜夜干,一区二区三区在线免费观看,色91av,欧美激情片一区二区,91cn国产在线

Casus Products>> Casus

  The Q10B23M-C produced by XINGTAI STEEL has the advantages of high purity, good surface quality, small depth of decarbonization layer, low cracking rate of cold heading, high strength and good hardenability after heat treatment. It is mainly used to make high-strength automobile fasteners. A customer of XINGTAI STEEL using the product to make automobile bolts, reflecting the product quality stability, meet the final product use requirements.