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1·The sales, maintenance and service of rotary drilling rig drill rod;

旋挖钻机钻杆的销售、维修、服务；

2·They are different from that of conventional rotary drilling equipment.

这些设备与常用的钻进法设备不同。

3·Because it is in mass production, using a rotary drilling fixture, improved production efficiency.

由于是中批量生产，采用了回转式钻床夹具，提高了生产效率。

4·Based on the principle of conversation of energy, the energy for rotary drilling has been analyzed.

旋转钻进是岩土工程钻探的主要钻进方式，从能量守恒原理出发，对旋转钻进的能量进行分析。

5·Based on the principle of conversation of energy, the energy for rotary drilling has been analyzed.

旋转钻进是岩上工程钻探的主要钻进方式，从能量守恒原理出发，对旋转钻进的能量进行分析。

6·The rotary drill stem will engender direction drift in rotary drilling of directional well and cluster well.

在定向井及丛式井的转盘钻进中，旋转钻柱会产生方位漂移。

7·The steer-able rotary drilling system can control the well path timely and accurately, but it is too expensive.

旋转导向工具进行连续导向钻井具有随时可控性，轨迹控制质量高，但使用成本很高。

8·The method of rotary drilling hole and protecting hole wall by static mud is an advanced technique to drill hole.

静态泥浆护壁旋挖成孔工艺是一项先进的成孔工艺。

9·The rotary drilling rig excavation in Yingbin Road station means the start of the station enclosure construction.

迎宾路站旋挖钻机开挖，意味着该站围护施工的开始。

10·The forming mechanism of the bias force is the key to the study of the modulated steerable rotary drilling system.

导向力的形成机理是研制旋转导向工具的核心。