很多军事设施利用已经开采完毕的矿井，相当于废物利用，成本并不高，现代矿井出事几率比较低

来源: wuyg719 于 2026-03-10 18:39:00 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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