建水泥牆成本比攔截導彈低得多，為了保證攔截率要發射三枚防空彈來攔截一枚來襲彈，需1千萬美元。建水泥防護牆隻需幾萬美元

來源: 天青水藍於 2023-01-14 20:09:46 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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