日本中出在线观看,日韩亚洲精品视频,欧美成人三级精品,一区二三区视频电影,日本伊人色综合网,三级全黄的视频在线观看,三级全黄的视频在线观看

Casus Products>> Casus

XG835NH with high strength weathering steel,which is researched and developed by Xingtai Steel and railway institute and Downstream customers use this product to produce high strength bolts.Widely used in steel structure likerailwayvehiclesbridges,towers and other long-term esposure in the atmosphere.The steel structure used this product with corrosion prolong life,thinning and reducing consumption,save work and energy ,etc.