这的确是半吊子集邮！因为不是专业的，而且，前面的邮票被人偷了，仅剩一半。请先生赐教，何为三大邮系?

来源: dlu 于 2023-04-28 11:26:19 [旧帖] [给我悄悄话] 本文已被阅读：次

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