您要查找的是不是:
- portable derrick (or mast) 轻便井架
- The fixed set of pulleys (called sheaves) located at the top of the derrick or mast, over which the drilling line is threaded. 位于重型井架或桅架式井架顶部的固定的滑轮组(称之为滑车轮槽轮),通过该滑轮组钻井钢丝绳进行穿绳。
- portable derrick [mast] 轻便井架
- Keep away from trees or masts which are likely to be struck by lightning. 树木或桅杆容易被闪电击中,应尽量远离。
- The ginpole is the simplest form of derrick. 起重吊杆是一种最简单的起重机。
- Whether it rains or not makes no difference to me. 下不下雨对我来说都一样。
- Description:Design plastic and mechanical parts/structure for wireless mobile devices. Requirements: Bachelor or Maste...... ... 公司名称:司亚乐无线通讯科技(深圳)有限公司工作地点:其他发布时间:2009-7-18
- A long pole extending upward at an angle from the mast of a derrick to support or guide objects lifted or suspended. 吊杆从起重机的竖樯上以一定角度向上伸出的长杆,用来支持或牵引物体竖立或吊起
- A portable serving stand or table. 可移动的上菜架或上菜桌
- Bob tuned in his portable radio to a record show. 鲍伯收听手提收音机的唱片广播。
- Completely portable and very light weight. 便携式的,而且重量很轻。
- A portable enclosure in which a baby or young child can be safely left to play. 游戏围栏供婴儿或幼童安全地在里面玩耍的轻便围栏
- To raise or lower(the boom of a crane or derrick. 升降使起重机的吊臂上升或下降
- Portable telephones are very popular nowadays. 现今,移动电话非常普及。
- Many one or little one is indifferent to me. 多一个或少一个对我是无关紧要的。
- Chock the barrel up or else it will roll over. 用楔子塞住圆桶,不然它会滚过去。
- He found that little TV extremely portable. 他觉得那台小小的电视机携带极其方便。
- I bought my son a portable typewriter. 我给儿子买了一台手提式打字机。
- To raise or lower(the boom of a crane or derrick). 升降使起重机的吊臂上升或下降
- The document had been typed on a small portable. 这份文件是用便携式打字机打的。