B21最高時速小於0.8馬赫，世界上隻有中國能製造出時速超過音速且極其隱身無尾翼的戰鬥機

來源: sxyz 於 2025-01-12 20:10:33 [舊帖] [給我悄悄話] 本文已被閱讀：次

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