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

Main Products
Products Grade: Q235NH、G295NH、XG295NH
Specifications: 5.5-38mm
Applied Standard:  GB/T4172 or agreement
Characteristics: Mainly used to produce fasteners of class 4.8-6.8
Applications: Common fastener
Use of Products: These product have characteristics of uniform chemical composition, low percentage of harmful elements, high purity, tight tolerance, good surface quality. The products can be used without heat treatment and surface treatment, and will be excellent weather-resistant performance.