| 1. | They are by-products from the oil extraction .
它们是提炼石油时产生的副产品。 |
| 2. | Oil fields : freeze protcction for oil extraction tree
油田井口采油树的伴热防凝。 |
| 3. | Food food oils separation washing flavors and essential oils extraction
实现多级串联逆流洗涤或萃取 |
| 4. | Oil extraction with rod is the main means of raw oil exploitation in our country
有杆抽油是我国原油开采的主要方式。 |
| 5. | The mining , oil extraction , and gas extraction industries form yet another group
从事采矿、采油和采气行业的焊工组成另外一个群体。 |
| 6. | In the oil field of our country , there is a problem of low productive efficiency of oil extraction commonly
在我国的油田中,普遍存在着油井采油效率低下的问题。 |
| 7. | By broking the wall of powdered oils with ultrasonic , the oil extraction efficiency yield was 65 % , which met the need of determining pov
超声波破壁法提油其提油率可达65 %左右，可满足测定要求。 |
| 8. | The pressure datum is an important means of researching the speciality of oil stratum , mastering its status and checking the process of oil extraction
它是研究油气层特性、掌握油气层动态、检查地面采油工艺流程的重要手段。 |
| 9. | However , with the development of the oil field exploitation , the requirement of the technology of oil extraction and management become higher and higher
并且，随着油田开发的不断深入，对采油工艺水平和管理水平的要求也越来越高。 |
| 10. | The oil extraction plant of oil field is the basic production unit of petroleum industry , which is the main industry of our country ' s energy
油田采油厂是我国能源骨干产业? ?石油工业的基本生产实体。它的生产和管理是一个相当庞大而且复杂的工程。 |
