| 1. | Influence of acceding to wto upon natural gas industry in china
对我国天然气工业的影响 |
| 2. | Petroleum and natural gas industries - piping
石油和天然气工业.管道 |
| 3. | Petroleum and natural gas industries - aluminium alloy drill pipe
石油和天然气工业.铝合金钻杆 |
| 4. | Petroleum and natural gas industries ? ? specification for wire rope
石油天然气工业用? ?钢丝绳规范 |
| 5. | Petroleum and natural gas industries - aluminium alloy drill pipes
石油和天然气工业.铝合金钻杆 |
| 6. | The application and study of
管道在天然气工业中的应用与研究进展 |
| 7. | Series 190 diesel engine for the petroleum and natural gas industry
石油天然气工业用190系列柴油机 |
| 8. | Petroleum and natural gas industries - shell - and - tube heat exchangers
石油和天然气工业.壳管热交换器 |
| 9. | Petroleum and natural gas industries - pipeline transportation systems
石油和天然气工业.管道输送系统 |
| 10. | Petroleum and natural gas industries - pipeline transportation systems
石油和天然气工业.管道输送系统 |
