国内精品久久久久久久日韩,成人国产视频在线观看,亚洲精品国产一区二区,少妇一级淫片免费放在线,视色av,国产精品美女久久久av,蜜桃av网站

Main Products
Products Grade: XG835NH
Specifications: φ5.5~40mm
Applied Standard:  agreement
Characteristics: This product is mainly used to produce weathering steel fasteners of class 10.9.
Applications: Fastener steel
Use of Products: XG835NH has characteristics of uniform-chemical composition, low percentage of harmful elements, high hardenability ,good surface quality. It is a new type of weathering steel.IT has low corrosion rate,and can be used without coating.