造船相對容易.人員訓練難. 合格的軍官和士官更難. 二戰中日本的海航就是悲劇的例子.

來源: Uusequery 於 2023-02-09 13:22:59 [舊帖] [給我悄悄話] 本文已被閱讀：次

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