| 释义 |
operating derrick
基本例句
采油井架
At the end of this article, two examples of different types of derrick structures were analyzed.文中给出了两个采油井架的分析实例。
After removing the oil derrick, it will serve as a well-wheeled machine for workover operations.拆除采油井架后，又可作为轮式通井机使用，用于修井作业。 |