B21是B2的縮小簡化版，和當年把F18 A/B 放大成F18 E/F一樣。B2和F18有原型機

來源: 奔流12959 於 2025-03-23 14:42:55 [舊帖] [給我悄悄話] 本文已被閱讀：次

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