Standard: GB/ T3194-1998 Brand No.: 1100, 1050, 1200, 1060, 1070, 3003, 3105, 5052a, 8011 Standard: GB/ T3194-1998Brand No.: ... 1100, 1050, 1200, 1060, 1070, 3003, 3105, 5052a, 8011State: O, H12, H14, H16, H18 ... =3>1.3-4.5> or =4 aluminium sheet 1050/ 1060/ 1070