New changes of national standard about experimental technique for measuring Rockwell hardness and Rockwell hardness in metal[J]. MW Metal Forming, 2007, (1): 45-48,52.
            
            
                
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                            Citation:
                        
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                        New changes of national standard about experimental technique for measuring Rockwell hardness and Rockwell hardness in metal[J]. MW Metal Forming, 2007, (1): 45-48,52.
                        
                     | 
                
            
         
        
            
                New changes of national standard about experimental technique for measuring Rockwell hardness and Rockwell hardness in metal[J]. MW Metal Forming, 2007, (1): 45-48,52.
            
            
                
                    | 
                        
                            Citation:
                        
                     | 
                    
                        New changes of national standard about experimental technique for measuring Rockwell hardness and Rockwell hardness in metal[J]. MW Metal Forming, 2007, (1): 45-48,52.
                        
                     |