《知识就是力量》有一文“精密度的钥匙”苏联制造块规，怎也不过关，最后从蔡司得知是机器研磨才解决问题。

来源: chufang 于 2024-05-11 19:21:39 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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