Sealing ring is fitted on pump body , while impeller sealing ring is an optional part 设有泵体密封环，而叶轮密封环为可选用件。
Discharges deep well air and debris by being in an open position on pump start - up 当泵启动时，阀门处于开启状态，排放深井气体和碎片。
Numerical simulation and model test for the influence of pump intake design on pump flow conditions 进水池对水泵进水条件影响的数值模拟和试验
The hydrogeological condition and the original scheme on pumping are analyzed , and some new drainage methods are pointed out 本文分析场地地下水现状，剖析降水设计方案，提出有针对性的降水新构想。
Not only axial force on pump impeller but also its fluctuation is the biggest among the axial forces on the three working rollers 泵轮的轴向力最大，且变化起伏较大；其他两轮的轴向力变化较平稳，且数值也较小。
The dependence is obtained experimentally of the output properties of sppc and mppc coexistence on pump parameters of both the pump beams 通过实验得出了sppc和mppc共存时的相位共轭输出特性对二束泵浦光的泵浦参数的依赖关系。
Note : on pump discharge , the preferred check valves are an in - line spring loaded , swing design with lever and weight or lever and spring 注意：在泵的排泄口处，首选的止回阀是管内弹簧负载，旋启式，配置杠杆和重量或杠杆和弹簧。
Note : on pump discharge , the preferred check valves are an in - line spring loaded , swing design with lever and weight or lever and spring 注意：在泵排泄口，首选的止回阀是管内弹簧负载，带杠杆和压铁或杠杆和弹簧的旋启式止回阀。
Centrifugal pump is a commonly hydraulic machine , whose inner flow has direct influence on pump ' s performance and is a considered problem by the pump designers 离心泵是一种通用水力机械，其内部流动情况一直是泵设计人员十分关注的问题，因为泵内流动的优劣直接影响泵的性能。
In europe , taxes account for up to four ? fifths of the retail price , so even quite big changes in the price of crude have a more muted effect on pump prices than in the past 在欧洲，税金占汽油零售价的五分之四，因此，即使原油价格发生很大的波动，汽油价格所受的影响也不会像过去那么显著。
