国产又粗又长又大Av片_午夜射精日本三级内射人妻视频国内_亚洲仑片欧美仑片_欧美亚洲综合五月天久久_一区首发伦理青青草_无码国产精品亚洲а∨天堂dvd_香蕉伊蕉伊中文视频在线_黑狗×人文推荐writer_太粗硬小寡妇受不了视频_免费乱伦精品中文

Performance：Good corrosion resistance, easy to form, etc

Surface：Pickling surface

Application：Semi round head, flat head, countersunk head rivets, pop rivets, etc

Performance：Good formability, low processing stress, good corrosion resistance, etc

Surface：Oxalic acid coating, bright surface, pickling surface, etc

Application：Screws, screws, nuts, bolts, screws, etc

Performance：High temperature resistance, good corrosion resistance, excellent breaking force, etc

Surface：Pickling surface

Application：Screws, screws, nuts, bolts, screws, etc

Performance：Bright and fine surface, good welding performance, etc

Surface：Bright surface

Application：Jewelry, precision bearings, decorative materials, medical equipment, etc

Performance：Good elastic height, elastic width, etc

Surface：Bright surface, fog surface

Application：Hanger products, etc

Performance：High plasticity, good fatigue strength, good corrosion resistance, etc

Surface：Bright surface, fog surface

Application：Spring, tension spring, etc

Performance：Linear stability, good elastic height, elastic width, good formability, etc

Surface：Bright surface, fog surface

Application：Kitchenware products, etc

Performance：Good corrosion resistance, heat resistance, etc

Surface：Pickling surface

Application：Handicrafts, bearings, slip flowers, medical instruments, electrical appliances, etc

Performance：It is not easy to fall off and is easy to enter the die when used for cold heading

Surface：Oxalic acid coating, pickling surface, etc

Application：Step screws, rivets

Performance：Smooth surface, good corrosion resistance, etc

Surface：Oxalic acid coating, bright surface, pickling surface, etc

Application：Rivets, axles, springs, hangers, kitchenware, craft products, etc