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- advanced percussive drill 超前冲击钻
- However, the SEP in diamond rotary drilling was higher than the SEP in percussive drilling in lightly weathered hard as well as in extremely hard rock. 在微风化的坚硬与极坚硬岩石中，金刚石旋转钻进比功则明显高于冲击凿碎比功。
- Diamond drilling replaced percussion drilling. 金钻探取代了冲击钻探。
- Keywords impact;wave mechanics;hydraulic percussive drill;design; 冲击;波动力学;液压凿岩机;设计;
- This paper explains and proves briefly that the incident wave differes from the percussive force in percussive drilling, and both are two different conceptions. 本文简要地论证和说明了冲击凿入系统中的入射波和凿入力(即冲击力)是两个不同的力。
- 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。
- Based on certain mechanical quality of the rock, the analysis on the Polycrystalline Diamond Compacts (PDC) bit and the rotary percussive drilling is carried out. 在管棚支护所钻岩石的力学性质基础上,对管棚支护钻孔所采用PDC钻头和回转冲击的钻进方式进行了比较分析。
- The floor that stands by a floor in strong bottom digs a hole with percussion drill, knock nog, get on the traditional thread binding that play a base, secure with nail. 在强下部靠近地板的地板用冲击钻打一排孔，敲入木钉，把踢脚线装上，用钉子固定。
- At six we were fallen in for drill. 六点钟我们站好队准备操练。
- The workers are using the advanced electric drill. 工人们正在使用先进的电子钻。
- GCF-20A Reverse Circulation Percussive Drilling Rig GCF-20A型冲击-回转反循环工程钻机
- The sound of that drill jangles horribly on the nerves. 那台钻机的声音响极了，十分刺耳。
- England is an advanced industrial country. 英国是一个发达的工业国家。
- You'd better set a goal before you start the drill. 练习开始前，你最好设定一个目标。
- vibrating and percussive drilling 振动冲击钻进
- After a long drill he told the squad to fall out. 操练了好半天之后，他让这个班解散了。
- She had lots of drill in listening. 她在听力方面受过许多训练。
- The France is one of advanced country. 法国是发达国家之一。
- rotating and percussive drilling 旋冲钻井
- This drill can bore through rock. 这台钻机能钻透岩石。
