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信封等现行尺寸备录

 国 内 信 封 标 准
代号                    长                       宽                              备注
B6号                  176                     125                       与现行3号信封一致
DL号                  220                     110                       与现行5号信封一致
C5号                  229                     162                       与现行7号信封一致

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