国产免费高清在线 , a视频免费观看 , 云端之上电影完整版在线观看 , 天梯电影在线观看完整版,www.九色,97人人爱人人,韩国国产在线

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.