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钻头硬度等级划分代码
更新时间: 2021-03-19 19:20:46  

1、金刚石钻头简单按地层可分为:坚硬,中硬,偏硬,松软。

2、按金刚石钻头配比HR C可分:发45-55,35-40,30-35,25-30,20-25,15-20,10-15,3-8。

3、具体如何选择还得看钻进地层岩石。

关键词: 钻头 硬度 等级 划分 代码

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