象芯片，波音发动机，国内技术与图纸早就有了，关键是卡在材料上。

来源: 爪四哥于 2021-06-30 06:45:43 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.

Change Ad Consent