| 1. | Recommended practice for guarding of pumping units
装设抽油机防护装置的推荐作法 |
| 2. | Pumping unit dynamics analysis and its improvement
抽油机动力学性能分析及改进 |
| 3. | The improvement of fixing for donkey head of pumping unit
抽油机驴头紧固形式的改进 |
| 4. | Design of the polished rod dropout braking system
抽油机光杆断脱抱死系统设计 |
| 5. | A new kind of long stroke wheel style pumping unit
一种长冲程转轮式抽油机 |
| 6. | Wellhead bias - adjustable device for rod - pumped well
抽油机井井口调偏装置 |
| 7. | The design of chain type long stroke pumping unit
链式长冲程抽油机设计 |
| 8. | Research of saving energy control system for the oil - drawing machine
抽油机节能控制系统的研制 |
| 9. | Performance analysis of the new type of swing - rod pumping unit
新型摆杆式游梁抽油机的性能分析 |
