婷婷五月伊人,亚洲国产精品免费,日韩午夜福利在线观看,一区二区午夜按摩,久久精品国产免费,国产免费a级片全部,成人黄片在线播放

Casus Products>> Casus

  The QS20C-B produced by XINGTAI STEEL has the advantages of stable composition, highpurity of steel, small decarburization layer and less surface defects. It can be used to produce shaft rod, all kinds of mechanical parts, etc. A customer of XINGTAI STEEL uses this material to produce sleeve, which is used for passenger car. Instead, the product quality is stable and meets the use requirements.