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Original Gum

1、原胶

... 邮局代封条Omitted Perforation 原胶Original Gum （O．G．）加盖邮票? Overprinted Stamp ...

2、邮票背面原有的胶质

邮票背面原有的胶质。 original gum ..

original peach gum原桃胶

Some Original Gum一些原胶

电子、通信与自动控制技术

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