日本不卡高清视频v中文字幕观看互动交流_手机在线看片欧美日韩_日韩激情一级无码毛片_国产真实尾随入室迷晕丝袜美女_久久天天躁狠狠躁夜夜免费观看

Main Products
Products Grade: 30MnVS6
Specifications: φ15-25mm
Applied Standard:  agreement
Characteristics: ball studs
Applications: steering system parts
Use of Products: This grade has the feature of stable chemical composition and mechanical property, minor decarburization, good surface quality,homogeneous microscopic structure.cost-saving for quenched and temperde exemption, deformation from quenched and temperde avoidance.