免费无码国产免费172,日韩美女啪啪不卡视频,免费顶级欧美熟妇高潮xxxxx,竹菊影视一区二区在线

Main Products
Products Grade: LY
Specifications: φ5.5~42mm
Applied Standard:  Q/XG 124
Characteristics: The products are Used in cold rolling ribbed rod, common cold forming parts and construction etc.
Applications: Common fastener
Use of Products: This series of product has characteristics of uniform-chemical composition, low percentage of harmful elements, high purity, uniform organize, fine grain size, good surface quality. The products can meet demands of various cold forming process. The products have a series mechanics property in order to meet various uses and are widely used in various scopes of product.