当时苏联设计师没有考虑排沙口，后来在大坝上打一个洞一千万，打了无数个。。。。。。。。

来源: alldayallyear 于 2013-07-14 21:49:22 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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