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1987年7月,我的一位好友在即将入炉熔化的废铜中捡出一枚川陕革命根据地铜币。此币币质为红铜,直径
In July 1987, one of my friends picked up a copper coin in the Chuan-Shan revolutionary base near the molten copper scrap that was about to be put into the furnace. The currency is copper, diameter