国产欧美激情日韩成人三区|成A∨人片在线观看无码|91欧美精品午夜性色福利在线|亚洲一级黄色,男人的天堂久久久,久久综合操,国产超级乱淫视频播放免费

Casus Products>> Casus

  The 16MnCr5 produced by XINGTAI STEEL is a kind of case hardening steel.which can obtain hard and wear-resistant surface structure and good plastic and toughness core structure through appropriate production process. A customer uses our 16MnCr5 to produce engine valve tappet, who reflects that our product has good dimensional accuracy, stable composition, and low cracking rate during cold heading.