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。
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。
Based on the study in the water head area in Changle County, the paper emphasize the significance of protecting the water head area.
在实地考察昌乐县水源地现状的基础上，提出该县水源地保护的意义。
A check valve (3) can prevent the natural chemical absorption water head of the water head when the manual pump or the mechanical pump stops to work.
止回阀(3)起当手压或机械泵停止工作时能阻止水位差的自然吸药。
The bottom release outlets of the Three Gorges dam are characterized by a considerable number of outlets, large size, frequent operation, high water head and great variation in water head, etc.
三峡工程大坝泄洪深孔孔口数量多、尺寸大，且具有操作频繁、水头高、变幅大等特点。在技术设计阶段，对深孔长、短管方案进行过深入的比选研究。
Influenced by cohesion, the water head difference in silt is more than that in sand when seepage failure takes place. Influenced by piles, the water head difference of seepage failure also increases.
受黏聚力的影响，粉土破坏时的水头差较砂土大，同时基桩的影响也会增大破坏时的水头差。
The airfoil-shaped measuring flume water head loss isn't higher, and the water head losing has 14% of the total head of water.
机翼形量水槽的水头损失不大，水头损失约占上游总水头的14%左右。
The airfoil-shaped measuring flume water head loss isn't higher, and the water head losing has 14% of the total head of water.
机翼形量水槽的水头损失不大，水头损失约占上游总水头的14%左右。
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