说明美国认为C919已成气候，威胁很大。好在中国已有准备，只是需要时间测试改装国产发动机后的运行情况

来源: 21-C 于 2025-12-24 08:40:58 [旧帖] [给我悄悄话] 本文已被阅读：次

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