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在购自宁波市集邮公司的《推广普及广播体操》纪念邮资封(JF49)中发现折白,此封右部有4条折白痕迹,其中1条宽约0.5毫米,与邮资图直边
A discount was found on the JF49, a promotional universal broadcast gym purchased from the Ningbo Philatelic Corporation. There are 4 white lines on the right side of the envelope. One of them is about 0.5 mm wide,