日本中出在线观看,日韩亚洲精品视频,欧美成人三级精品,一区二三区视频电影,日本伊人色综合网,三级全黄的视频在线观看,三级全黄的视频在线观看

Main Products
Products Grade: SAE6150
Specifications: φ5.5~38mm
Applied Standard:  agreement
Characteristics: As usual,this product is used to produce hexangular wrench,or screwdriver.
Applications: Hand tool steel
Use of Products: This product has high purity, slight decarburisation, good surface quality. This product has high intensity and hardness.It can be made the high quality hand tool.