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- Immersing the drill pipe in fluid produces a buoyancy effect, reducing its weight and putting less stress on the drilling mechanism. 如果将钻杆浸入钻井液,就会产生浮力作用,降低钻杆重量,并会减小对钻探机械装置的压力。
- The compound drilling mechanism of turbodrill is elaborated in detail after analyzing the characteristics of turbodrill and coordination requirements for PDC bits. 从涡轮钻具的特性和PDC钻头配合要求着手，详细论述了涡轮钻具复合钻进的机理；
- Keywords taphole drill;cast house equipment;hammer drill mechanism; 开铁口机;炉前设备;钻冲机构;
- The drilling troops mustered on the hill. 演习部队在小山上集合起来了。
- The workman is drilling in the wall. 工人正在墙上打孔。
- Drilling is cutting a hole with a drill. 钻削就是用钻头钻一个孔。
- You operate the mechanism by winding this handle. 操纵这台机器要转动这个把手。
- At six we were fallen in for drill. 六点钟我们站好队准备操练。
- The noise of the drilling is intolerable. 钻孔的噪音让人受不了。
- The watch has delicate mechanism. 这块表有精细的机械装置。
- Let's examine into the basic mechanism involved. 让我们把有关的基本结构搞搞清楚。
- The sound of that drill jangles horribly on the nerves. 那台钻机的声音响极了，十分刺耳。
- 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。
- 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。
- A part of a mechanism that moves in this manner. 横移物以这种方式移动的一个机械零件
- This drill can bore through rock. 这台钻机能钻透岩石。
- The dentist's drill made a lot of noise. 牙钻发出很大的噪音。
- There's no mechanism for changing the decision. 没有办法改变这一决定。
- An airplane engine is a complex mechanism. 飞机引擎是种复杂的机械装置。
