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 30CrMnTi produced by XINGTAI STEEL has the advantages of stable composition, low harmful elements and few surface defects. By controlling the chemical composition and optimizing the rolling process, the product has excellent hardenability. A Southern customer of Xinggang used this product to make bicycle chains,who shows that the product quality can fully meet the needs of users and has won the unanimous praise of customers.