作废 SY/T 5415-1991
牙轮钻头磨损评定方法 牙轮钻头磨损评定方法
发布日期:1992-01-15
实施日期:1992-07-01
分类信息
标准简介
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牙轮钻头磨损评定方法

最后更新时间 2025-08-29