久久一日本道色综合久久不,99久久无码一区人妻A黑,国产精品爆乳在线播放,国产精品一区无码专区

  • <b id="9ocva"></b>
    

    • 

    <blockquote id="9ocva"></blockquote>
    


    



     
    

    

    

    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.