| 1. | Supply pressure is greater than static head pressure
供水压力大于落差压力。 |
| 2. | See table b for nominal head pressure
常规地柱头压参考表b 。 |
| 3. | Standard specification for reinforced concrete low - head pressure pipe
钢筋混凝土低水头压力管标准规范 |
| 4. | Standard specification for reinforced concrete low - head pressure pipe metric
钢筋混凝土低水头压力管的标准规范 |
| 5. | Abnormal well head pressure of high productivity gas wells in luojiazhai
罗家寨高产能气井测试井口压力异常分析 |
| 6. | Set head pressure , split flow , and septum purge flow to appropriate levels
设置相应的柱头压、分流比、隔垫吹扫。 |
| 7. | Equally effective in checking back flows from head pressure on the discharge or suction sides of pump
无论是泵的排泄口的排出压力，还是泵的吸入口，其流体止回的效果都是相同的。 |
| 8. | This paper analysed working principles and controling features of water lifts about the head pressure transition . plc was used to operate controling system so as to work the system well
摘要对水头差压力转换提水装置的工作原理及控制特点进行了分析，使用可编程控制器( plc )控制系统运行，使系统很好的工作。 |
| 9. | The valve seat shall be an elastomeric seal that will permit seating at low - head pressure , and an arrow shall be molded on the valve body for permanent visibility to indicate the intended direction of flow
阀座应该是弹性密封，它使得阀座处于较低的排出压力下，箭头应该永久性清晰可见地模铸在阀体上，标明计划的流向。 |
| 10. | The penetration test study the disturbance of soil in difference location . by using finite element method , the paper study the stratum movement and the earth surface deformation caused by pipe jacking , analysis the construction parameter such as head pressure , deflexion , friction force impact on earth surface deformation , give the distributing rule and range of additional soil pressure in soil
采用有限元计算分析的方法，对顶管施工引起的地层运动及地表位移进行研究，分析了机头土压力、机头偏斜、摩阻力等不同施工参数对地表变形的影响以及附加应力在土中的分布规律和影响范围。 |
