PATENTS
 





    
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                  PATENTS                                          

             
             Japanese Patent   NO. 868451  on Sub-zero Welding Process
            
             Japanese Patent   NO. 881371  on Electron Beam Welding
            
              Japanese Patent   NO.1467126  on Laser Optical System
             
              U.S.     Patent   NO.3989920  on Underwater Stud Welding
             
             Japanese Patent   NO.2011419  on Double gas shielding MAG welding

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