黄色一级片久久,天堂8√,午夜激情啪啪,亚洲人久久,国产成视频在线观看,蜜桃一区二区,97在线免费观看视频

Main Products
Products Grade: 304B,304HC
Specifications: φ5.5～11mm,φ5.5～24mm
Applied Standard:  agreement
Characteristics: stainless steel fastener.
Applications: Stainless steel fasteners
Use of Products: 304B,304HC is similar with 304, but regulate the Cr content and add Cu element.adding Cu not only can keep same corrosion resistance with 304 but also can improve other properties, it is benefit for drawing and forming.