File:陈翰笙进行经济调查和运算时使用的算盘,无锡博.jpg
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![File:陈翰笙进行经济调查和运算时使用的算盘,无锡博.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/f/ff/%E9%99%88%E7%BF%B0%E7%AC%99%E8%BF%9B%E8%A1%8C%E7%BB%8F%E6%B5%8E%E8%B0%83%E6%9F%A5%E5%92%8C%E8%BF%90%E7%AE%97%E6%97%B6%E4%BD%BF%E7%94%A8%E7%9A%84%E7%AE%97%E7%9B%98%EF%BC%8C%E6%97%A0%E9%94%A1%E5%8D%9A.jpg/800px-%E9%99%88%E7%BF%B0%E7%AC%99%E8%BF%9B%E8%A1%8C%E7%BB%8F%E6%B5%8E%E8%B0%83%E6%9F%A5%E5%92%8C%E8%BF%90%E7%AE%97%E6%97%B6%E4%BD%BF%E7%94%A8%E7%9A%84%E7%AE%97%E7%9B%98%EF%BC%8C%E6%97%A0%E9%94%A1%E5%8D%9A.jpg?20170819023304)
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