碳基纤维合成材料是趋势，即使不考虑稀土。AI说B-21用了大量的碳基纤维合成材料。

来源: 大观园的贾探春于 2025-10-17 21:29:16 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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