毛泽东年代军用步枪枪管生锈和磨损过快一直困扰着军队，原因是特种钢技术不过关和脱硫技术的不过关。

来源: man008 于 2022-11-25 12:03:12 [旧帖] [给我悄悄话] 本文已被阅读：次

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