日韩亚洲一区中文字幕在线,黄色视频免费观看网站,9191精品国产免费久久,欧美日韩三四级视频在线观看,亚洲国产成人久久综合碰,国产午夜av毛片久久,真人抽搐一进一出gif免费木瓜视频

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.