英语释义

1. the source or headwater of a stream

2. a dammed up body of water (as for supplying a garden or mill) also the height or quantity so retained

3. a large head especially hydrocephalus

4. one with an excessively large head and usually subnormal intelligence

片语

delivery head水头；压力差

water pipe head水管接头

large water-head大水位差

hydraulic head水头，液压压头

circulating water pump head循环水泵扬程

water ray head泡沫水两用喷雾头

The Water Falls Head低垂着头

water column head水柱高度

big water-head高水位差

water-head loss水头损失

英汉例句

• During the test and production of in-situ leaching of sandstone deposit, it is very difficult and complicated to exploit boreholes when confined water head of ore-bearing acquifer is quite low.

  在砂巖矿床的地浸试验和生产中，含矿含水层地下水承压水头很低时，地浸鉆孔的开拓难度很大且工艺复杂。

• Finally, some other characteristics of the variable water head standard device for large flow rate have been dealt with and theoretically investigated.

  本文对使用的方法进行了初步探讨，并讨论了变水头大流量标準装置的一些其它特性。

• When the system is confined well, the change of observation water level has a linear relation with water head change.

  在系统封闭很好的情况下，观测水位的变化基本与水头的变化呈线性关系。

• The uncertainty of the parameters may induce uncertainty calculation of water head and velocity of flow, and influence the reliability of the results of groundwater resources appraising.

  参数的不确定性将导致计算的水头、流速的不确定性，并影响到地下水资源评价结果的可靠性。

• A mathematical model whose variable is water head can simulate the effects of water head and properties of subsurface irrigation pipe on irrigation.

  以压力水头为因变量的数学模型可以模拟供水压力和灌水器特性对灌溉效果的影响。

• The process and result of the experiment shows in the scheme the assumption of water head diversion by 50% and water-saving rate by 50% is feasible and practical.

  试验过程及结果表明，该方案削减船闸工作水头约50%，船舶一次过闸省水率约50%的设想是可行的，合乎实际的。

• Actually, in the tube engineering, the proportion of the loss of local water head in the loss of pipeline water head is big.

  在实际管道工程中，阀门阀道的局部水头损失占管路水头损失的比例是相当大的。

• In the process of making optimal load dispatch plan in hydroelectric plants, it is usually supposed that the water head of the hydroelectric plant is not changing.

  在水电站制定厂内机组最优负荷分配时一般都假设水电站的水头是不变的。

• Because of the high water head and high flow speed, the aeration for preventing cavitation erosion becomes more and more important.

  由于水头高，流速大，明流泄洪洞的掺气减蚀越来越受到重视。

• Hydraulics in water releasing structures with high water head and large discharge capability has been paid close attention recently.

  高水头、大泄量的泄水建筑物水力学问题是水利工程建设中特别受关注的问题之一。

• The method disturbs the flow pattern relatively less and the water head loses in small.

  此补强方法对水流流态干扰较少，水头损失小。

• Model test indicates the conclusion is reliable and can be applied to large size inverted siphon with a low water head and great flow rate.

  结论对南水北调中线工程和平原地区的低水头大流量倒虹工程弯管设计具有重要的应用价值。

• Though the range of water head is not too wide, maximum efficiency of Goupitan hydroelectric plant is very high and weighted efficiency focus on rated head wide range in flow.

  尽管构皮滩电站的水头变幅并不大，但最高效率要求较高，而且设计水头附近横向权值大。

• An effective pre-drainage system in a limited area that has a high water head and huge inflow is important to prevent flooding accidents during subsea tunnelling.

  一个有效的预排水系统在一个有限的区域内，有一个高水头，巨大的流入，重要的是要防止水浸事故发生的海底隧道。

• Meanwhile, the tube water head line drawn by the computer makes the graphic result clear.

  同时，运用计算机绘制出水头线，使图形结果一目了然。

• Calculation formula of velocity distribution, boundary layer thickness, friction force and loss of water head are given out, in accordance with the result from theory analysis of similitude solution.

  对于速度边界层提出了相似性解的解析结果，给出了速度分布、边界层厚度、摩擦阻力和水头损失的解析计算表达式。

• The type of flow would affect the calculation of water head losses.

  管内流态的变化会影响水头损失的计算。

• The time and spatial effects of excavation considering the variation of water head difference between the inside and the outside of a foundation pit were then investigated.

  研究了考虑坑内外水头差变化时的基坑工程时间效应和空间效应，并与不考虑坑内外水头差变化的情况进行了对比。

• Higher water head closure has become a trend with the development of river way closure.

  从河道截流的发展趋势来看，高水头截流已成为一种趋势。