Express root welding technology used in the long-distance pipeline construction[J]. MW Metal Forming, 2009, (8): 74-76.
            
            
                
                    | 
                        
                            Citation:
                        
                     | 
                    
                        Express root welding technology used in the long-distance pipeline construction[J]. MW Metal Forming, 2009, (8): 74-76.
                        
                     | 
                
            
         
        
            
                Express root welding technology used in the long-distance pipeline construction[J]. MW Metal Forming, 2009, (8): 74-76.
            
            
                
                    | 
                        
                            Citation:
                        
                     | 
                    
                        Express root welding technology used in the long-distance pipeline construction[J]. MW Metal Forming, 2009, (8): 74-76.
                        
                     |