SGS（VCI film）        Testing report of SGS(Anti-rust coating)        
 Application prove of army                  Employment prove of army                    
 Testing report of Wuhan institute of Material Protesting            
  Testing report of salt fog                Examine report of disease proventive centre
 Testing report of Xisha archipelago        Great Wall certificate
 Quality testing report of Beijing Institute of Aeronautical Material
certificate of quality system　　　　　　　 msds