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RE: Visiting A Pencil Manufacturing Factory / 参观铅笔工厂

in #dlive • 6 years ago

铅笔用了很多年了，没想到铅笔竟然是这样生产出来的，确实又涨知识了

6 years ago in #dlive by
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     6 years ago  

    我也是第一次见到，呵呵。

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