硬质合金钻头 carbide drill ; carbide bit ; carbide-tipped drill ; cemented carbide bit
硬胶泡沫钻井液 ebonite foam drilling fluid
维氏钻石硬度 Vickers diamond hardness
镶硬质合金钻头 tipped bit ; carbide tipped drill
镶碳化钨硬合金齿钻头 sintered tungsten carbide compact bit
硬质合金钻 carbide drill
硬砂岩钻头 core-barrel bit
整体硬质合金钻头 solid carbide drill
硬质合金钻头包边 hard metal bit tipping
硬岩层钻井 hard-rock drilling
你必须在岩石上打钻，而那些岩石比你通常在油田遇到的要硬得多。
You have to drill into rocks much harder than those you normally encounter in oil fields.
要做到这一点，你必须在岩石上打钻，而那些岩石比你通常在油田遇到的要硬的多。
To do that, you have to drill into rocks much harder than those you normally encounter in oil fields.
经过几年对锚杆钻机的跟踪研究，发现锚杆钻机在围岩作业中常遇到软岩中有硬岩夹层的现象，造成施工过程经常更换钻具的问题。
After several years to jumbolter research, the hard rocks always present in the soft ones in the wall rock procedure using jumbolter, which results in changing the boring tool during the procedure.
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