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半美元双面币(鹰,双背面)
双面都是背面(老鹰)
只要你一扔枚硬币就知道是哪一面
打赌猜面专用硬币.打赌永远不会输
美金双面币演示视频:
https://v.youku.com/v_show/id_XNDI5MjU0MjMyNA==.html?spm=a2h3j.8428770.3416059.1
https://v.youku.com/v_show/id_XNDI5MjU0NjE0OA==.html?spm=a2h3j.8428770.3416059.1
Double Sided Half Dollar (Tails)
Just you throw a coin to the air and guess what side will be visible when the coin falls. You receive a coin with the same face in both sides.
