They have all been used in the field of rock drilling.

它们均以矿山凿岩为应用领域.

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Bouldering rock drilling, deep - rooted, and Cooper point to the distortion is the same direction.

钻岩抱石, 盘根错节, 而且古柏的扭曲全是指向同一方向的.

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The results of field tests proved that PDC anchor bit is ideal in mid - hard rock drilling.

现场试验结果表明,PDC锚杆 钻头是钻进中硬岩层的理想钻头.

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Fractal charact 6 tistics of rock drilling powder is researched with fractal geometric theory in this paper.

本文应用分形几何理论研究了矿山凿岩时岩粉粒度分布的分形特征.

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The revolving - drilling technique is one of the new - type and effective methods for hard rock drilling.

冲旋钻井技术是一种新型、高效钻进硬地层的方法.

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Piston type air compressors are widely used in mines, especially in underground rock drilling.

活塞式空压机广泛应用于矿山行业, 尤其是井下凿岩.

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