亚洲色图欧美色,久久不射电影,欧美激情手机在线,好看的一级毛片,亚洲狼人区,天天爱天天做天天爽,91欧美日韩

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.