免费在线看黄网址|av不卡免费看|日韩一二三四五区|国产日韩在线不卡,亚洲午夜激情网,国产自一区,啊啊啊国产

　　The material XGS45C of Xingtai Iron and Steel Corp.,Ltd is a dedicated material for shaft and rod, mainly used to produce automobile damping rod, engine gear ring and other products. Customers reflect that our XGS45C material has good control of  hardness, stable surface quality and less hemp pit, pitting, also has high product yield.