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- Drilling derrick that working many years often has the defect of bending bar. 服役多年的钻机井架常会出现局部杆件弯曲现象。
- A dismantling and assembling machine for four-leg drill derricks and a mechanically assembleddrill derrick have been developed, which are thought to the trend of the geologic drill derrick. 指出了目前钻塔拆装存在的缺点，提出了解决的新途径，研制成功了四腿钻塔拆装机及机装可逆式四腿管子钻塔，认为这是地质钻塔发展的新方向。
- The ginpole is the simplest form of derrick. 起重吊杆是一种最简单的起重机。
- At six we were fallen in for drill. 六点钟我们站好队准备操练。
- 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。
- 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。
- What's the drill for claiming expenses? 费用报销的手续，是怎样的?
- drill derrick 钻塔
- The class is chopped up into small groups for oral drill. 为进行口语训练，班级分成为几个小组。
- hoisting on drill derrick 钻井架提升
- We put up at the surface an oil derrick. 我们就在那块地面上竖起一个井架。
- The pupils filed out of the room during the fire drill. 在消防演习中，学生们排成纵队走出房间。
- Could you give me a hand in adjusting the derrick? 你是否能帮我调整一下吊杆?
- Do you give me a hand in adjusting the derrick? 你看是否能把我们的安排通知领班?
- It's an electric drill with a range of different attachments. 这是一个带有各种配件的电钻。
- A shaft on which a working tool is mounted, as in a dental drill. 心轴用于安装工具的蕊棒，如牙钻蕊棒
