只需要低成本挖一个小矿洞，让这些小孩子钻进去，把煤挖出来。小孩算是挖煤特种兵，需求量挺大的。

来源: easycity 于 2023-07-28 06:05:55 [旧帖] [给我悄悄话] 本文已被阅读：次

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