国产免费高清在线 , a视频免费观看 , 云端之上电影完整版在线观看 , 天梯电影在线观看完整版,www.九色,97人人爱人人,韩国国产在线

Main Products
Products Grade: GCr15-DT
Specifications: φ5.5~26mm
Applied Standard:  agreement
Characteristics: GCr15-DT is better than GCr15 of GB/T18254 on chemical、non-inclusion、Carbide homogeneity、decarburization and surface quality。
Applications: Auto Bearing steelBearing steel
Use of Products: The product is used to produce balls and rings of bearing.