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- firedamp drainage drill 排放瓦斯钻机
- A kind of hydraulics system for CKS-I hydraulic gas drainage drilling rig was designed. 介绍了一种自主设计的CKS-I型全液压瓦斯抽排放钻机的液压系统。
- He came to look at the drainage. 他是来检查排水设备的。
- The drainage system has been aged. 排水系统已经老化了。
- 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。
- firedamp drainage 排放瓦斯
- 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?
- 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。
- The drainage of the town is not good, some of the pipes are broken. 城里的排水系统不好,有些水管断裂了。
- The explosive mixture of firedamp and air. 甲烷和空气的爆炸混合物
- 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。
- So I regard firedamp pool as treasure " . 所以我把沼气池视为宝”。
- 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
