Analysis and prevention of crack in 40Cr drill pipe joints[J]. MW Metal Forming, 2009, (7): 54-54.
            
            
                
                    | 
                        
                            Citation:
                        
                     | 
                    
                        Analysis and prevention of crack in 40Cr drill pipe joints[J]. MW Metal Forming, 2009, (7): 54-54.
                        
                     | 
                
            
         
        
            
                Analysis and prevention of crack in 40Cr drill pipe joints[J]. MW Metal Forming, 2009, (7): 54-54.
            
            
                
                    | 
                        
                            Citation:
                        
                     | 
                    
                        Analysis and prevention of crack in 40Cr drill pipe joints[J]. MW Metal Forming, 2009, (7): 54-54.
                        
                     |