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 QML40Cr-B material produced by XINGTAI STEEL is mainly used to produce high strength bolts such as hub bolts, cylinder head bolts and so on. The material has the advantages of high purity of steel, small decarbonization layer and less surface defects. A customer uses our QML40Cr-B to produce hub bolts for passenger cars. The customer responded that our QML40Cr-B material has good hardenability, uniform hardness, high fatigue life, and the quality fully meets the product requirements.