激情六月丁香婷婷,独臂刀客22集高清完整版在线观看,丁香深爱五月,亚洲美女高潮久久久,重生之炉鼎未删减完整版在线观看免费,韩国三级在线最新未删减,免费看黄色电影

Main Products
Products Grade: QGCr15
Specifications: φ5.5～26mm
Applied Standard:  Applied Standard:agreement
Characteristics: The product is used to produce balls and rings of bearing,which need long life and high reliability.
Applications: Auto Bearing steelRailway bearing steelBearing steel
Use of Products: Use of Products: Because of better raw material and exercise strict control, QGCr15 is better than GCr15 of GB/T18254 on non-inclusion、Carbide homogeneity、decarburization and surface quality. It has good comprehensive properties.