| 1. | Petroleum and natural gas industries - pipeline transportation - pipeline valves
石油和天然气工业.管道输送.管道阀 |
| 2. | Valves for natural gas transportation in pipelines - performance requirements and tests
天然气输送用管道阀.性能要求和试验 |
| 3. | Petroleum and natural gas industries - pipeline transportation systems - pipeline valves
石油和天然气工业.管道运输系统.管道阀 |
| 4. | Petroleum and natural gas industries - pipeline transportation systems - subsea pipeline valves
石油和天然气工业.管道输送系统.海底管道阀 |
| 5. | Petroleum and natural gas industries - pipeline transportation systems - pipeline valves iso 14313 : 1999 modified ; english version en 13942 : 2003
石油和天然气工业.管道输送系统.管道阀 |
| 6. | Petroleum and natural gas industries - pipeline transportation systems - subsea pipeline valves iso 14723 : 2001 ; german and english version en iso 14723 : 2001
石油和天然气工业.管道输送系统.海底管道阀 |
| 7. | Abstract : the function expression for coefficient of pipeline ' s local head loss was presented through optimizing fitting to coefficient values listed in tables . the fitting accuracy is acceptable
文摘:采用优化拟合法通过对图表中有关数值的拟合，给出了管道阀件阻力系数的函数表达式，具有较高的拟合精度。 |
| 8. | They say the information could possibly be used in an alert system to give seconds to tens of seconds of advance notice of an impending quake - enough time for schoolchildren to take cover , power generators to trip off and valves to shut on pipelines
这些研究人员说，这一信息可用于警报系统，即提前几秒钟或数十秒钟发出地震已迫在眉睫的警报，从而能有足够的时间使孩子们躲到安全的地方，使电机和管道阀关闭。 |
