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: 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.