pumping head

Over pumping of ground-waters produces a difference in hydrostatic head in favor of the seawater.

过量抽取地下水时,产生利于海水的流体静力学水位差.

Not to mention vein-pumping competitions, an integral part of football comes from reciprocation of tactical head-butting.

除了让人热血沸腾的对决，足球不可或缺的一部分是技战术道高一尺魔高一丈的较劲。

It gets your blood pumping to your head more quickly.

这让血液更快到达大脑。

Hydraulic model tests for head tank of sewage pumping station;

污水站储罐液位是油气田集输工艺的重要参数之一。

The feature of the progressive cavity pump mobile intermittent recovery technique is using a tractor as power unit, adopting a double universal coupling transmitting the power to a drive head to make the rod string rotate and thereby drive the progressive cavity pump for pumping.

新开发的螺杆泵机动间歇采油技术及设备的主要特征是用拖拉机做动力源，用双万向联轴器把动力传递给驱动头，由驱动头带动抽油杆柱旋转，进而驱动螺杆泵旋转抽油。

Based on the background for construction of East Route Project of the South-to-North Water Transfers, major project of city flood prevention and large pumping station reconstruction, this paper focuses on low-water head large scale pumping station.

本文研究以南水北调东线工程、城市防洪重点工程建设和大型泵站更新技术改造为背景。

The confined aquifer is influenced by both heat transfer and groundwater flow during storing energy. The temperature field and head field will change a lot, which have an impact on pumping temperature and storage ratio, and then decrease the efficiency of heat pump system.

在储能过程当中，含水层受到地下水流动和传热的耦合影响，其温度场，压力场有较大的变化，进而对抽水温度和储能率造成影响，影响整个热泵系统的效率。

The thermal refining defect of rod head was eliminated by the tracking preheat treatment of rod head to improve the reliability of the pumping rod application.

采用杆头跟踪预热处理技术，消除了杆头调质缺陷，提高了抽油杆应用的可靠性。

As its structure character of beam pumping unit, vibration and noise happen on the joint of connection rod head and beam during operation.

游梁平衡抽油机由于其自身结构特点，在运行过程中，连杆上接头与横梁连接部分经常会出现振动和响声。

Based on the char-acteristic of large fluctuation in static head of the drainage pumping station of a hydropower station, this paper presents a mathematic model for economic operation of the pumping station with calculating method and example.

本文根据水电站排水泵站静扬程变幅大的特点，建立了泵站经济运行的数学模型，给出了计算方法，并附有算例。