比如在坝顶纵向开挖一连串炮眼，总共放进一卡车炸药，炸出一道缺口。在水流冲刷下，要很长时间，一个月，缺口才会扩大，导致溃坝

来源: easycity 于 2023-06-07 05:21:21 [旧帖] [给我悄悄话] 本文已被阅读：次

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