The value of SEDD is nearly equal to that of specific energy of percussive drilling(SEPD) in moderately weathered granite.
在软的全风化及强风化花岗岩中，金刚石钻进比功值低于冲击凿碎比功值；
In this paper, based on the theory of percussive drilling, the following optimum design of hydraulic rock drills are studied with the application of wave mechanics.
本论文在冲击凿岩的理论基础上，应用波动力学理论，研究了冲击凿岩系统优化设计中的一些问题。
GCF-20A reverse circulation percussive rotary drill rig is a multi function drill rig with percussive drilling as the main means and rotary drilling as supplemented.
0a型冲击-回转反循环工程钻机是以冲击钻进为主、回转钻进为辅的多功能钻机，可适应软、硬岩石等不同地层钻进的要求。
GCF-20A reverse circulation percussive rotary drill rig is a multi function drill rig with percussive drilling as the main means and rotary drilling as supplemented.
GCF -2 0a型冲击-回转反循环工程钻机是以冲击钻进为主、回转钻进为辅的多功能钻机，可适应软、硬岩石等不同地层钻进的要求。
This paper introduces the automatic drilling principle, the hardware composition and software program in the windlass percussive drilling by the microcomputer control system.
介绍了卷扬式冲击钻进过程中，微机控制实现自动钻进的基本原理、硬件的组成和软件的设计。
This instrument, simple in structure and of multi-function, may be used to measuring the drillability and abrasivity of rocks, and simulate rotary or rotary-percussive drilling as well.
该仪器结构简单，具有多种功能，可进行回转或冲击回转钻进法的可钻性测试及钻进规程的模拟，也可用来测试岩石研磨性。
Recently the Guangxi First Geological Engineering Construction Company introduces the percussive reverse drilling method, and has made a great breakthrough.
最近，广西第一地质工程地质施工公司引进了冲击反循环钻进方法用于滑坡治理工作，取得重大突破。
Study on the percussive rotary drilling law under various temperatures is of great significance because it can provide a theoretical basis for new drilling process designed for geothermal production.
研究不同温度条件下冲击回转凿岩规律具有重要意义，可以为设计地热开采的新型钻探方法提供理论依据。
The percussive - rotary drilling technology is one of the most effective ways to solve the drilling difficulties in hard rock in recent years. The technology has a good application prospect.
旋冲钻井技术近年来已成为石油钻井界广泛关注的热点研究课题，被认为是解决深井硬地层钻进难题的最有效方法之一，具有良好的应用前景。
Hydraulic rotary-percussion drilling is one of five important drilling techniques recently. Itstechnique nucleus is hydro-percussive tools.
作为当今五大钻探技术之一的液动冲击回转钻探的技术核心是液动冲击器。
Hydraulic rotary-percussion drilling is one of five important drilling techniques recently. Itstechnique nucleus is hydro-percussive tools.
作为当今五大钻探技术之一的液动冲击回转钻探的技术核心是液动冲击器。
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