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- withdraw speed of drill rod 提钻速度
- The drill rig adopts hydraulic transmission way to realize the rotation,propulsion,getting up and pulling of drill,as well as adjustment and fixing of drill rod obliquity during working. 该机工作过程中钻具的旋转、推进、起拔以及钻杆倾角的调整和固定等动作全部采用液压传动方式实现;
- In order to attain the goal,the rotary speed of bit must be increased.By the action of high roatry speed,excentric shaft connection intensifies the fatigue failure of drill tool. 为了达到较好的防斜目的,必须增大钻进时钻头的转速,在高转速的作用下,偏轴接头加剧了钻具先期疲劳失效。
- The floating Rotary Head avoids abnormally wearing of drill rods' threads. 滑动式动力头，避免钻杆丝扣的非正常磨损；
- The floating trailing plates avoid abnormally wearing of drill rods' threads. 浮动式动力头拖板，避免钻杆丝扣的非正常磨损；
- An analysis related to various kinds of soil cutting by earth auger,this paper puts forward that running speed of frill should be faster than critical speed so as to increase the efficiency of drill. 通过分析长螺旋钻机在切削各类土质时，钻具的角速度与土块运动机理关系，提出确定钻具临界的方法，而工程施工中钻杆的实际转速应大于临界转速，以提高钻机的工作效率。
- The speed of this aircraft is very high. 这架飞机的速度非常快。
- She had lots of drill in listening. 她在听力方面受过许多训练。
- The hurricane has a speed of 73 miles per hour. 飓风每小时73英里。
- The speed of a runaway horse count for nothing. 脱缰之马的速度毫无价值。
- THE DETER MINATION OF CRITICAL CRACK ON WELD AND HAZ OF DRILL ROD 钻杆焊缝及热影响区裂纹容限的确定
- The speed of light is an important constant. 光速是一个重要的常数。
- Study on Theory of Drill Rod with New Type Structure 一种新型结构钎杆的理论研究
- The speed of the toy boat is variable. 玩具船的速度是可变的。
- Integral Short Drill Rod Type DZ. 型整体式短钻杆。
- The symbol for the speed of light in a vacuum. 表示真空中光速的物理符号
- Rotating speed of drill staft(vertical) 钻轴的转速(垂直)
- Rapidity or speed of motion; swiftness. 迅速，快速运动的快速或速度; 迅速
- When did the first measurement of the speed of sound take? 第一次测量声速是在什么时候？
- The separation of solid particles in centrifuge is connected with the throughput, rotating speed of centrifuge bow, viscocity of drilling fluids and solid particles distribution. 固体颗粒在离心机内的分离跟离心机的处理量、转鼓转速、钻井液粘度和固体颗粒粒度分布有关。
