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 nonlinear relation between node pressure head of the pipe network and water capacity and pressure of water supply pump station was deduced by SVM.
利用支持向量机推求管网节点水头和供水泵站供水量、供水压力的非线性关系。
The computation for the processing head loss of water diversion in the pressure pipe is related to that whether or not the project can reach the designed flowrate or the project can operate safely.
有压管道输水的沿程水头损失计算，关系到工程能否达到设计输水流量和能否安全运行。
Right box (third, the first six dynamic head) can rotate, meet different angle water mouth, pipe processing of need;
右箱体（第三、第六号动力头）可转动，满足不同角度水嘴、管件的加工需要。
Head cover of cement kiln, cooler, decomposing furnace, heating furnace of steel rolling, furnace bottom. Wrapping of water pipe, wall and roof of furnace, ect. It can be used for repairing quickly.
水泥窑窑头罩、冷却机、分解炉、轧钢加热炉，炉底、水管包扎、炉墙、炉顶等部位，可进行快速抢修。
The utility model relates to a pneumatic water pipe dredger, which is mainly composed of a base pipe, a compressed air bottle and a sheathing head. A short through pipe is arranged in the base pipe.
本实用新型涉及一种气压式水管通水器，主要由基座管、压缩空气瓶及套头所组成；
The common characteristic features of this method is to deal with the working conditions of the designed maximum discharge of closed circuit and then to determine the pipe diameters and water head.
方法的共同特点是先找出管网输配最大流量的工况，然后确定管径及水压。
A method of arranging orifices with varied opening area according to the pressure variation in the pipe is suggested in order to ensure the uniformity of water-distribution in the low head filter.
并提出按管内压头来改变开孔面积的布孔方法，以便保证用于低水头滤池时布水的均匀性。
A grab handle is a hollow thin pipe, and a cleaning head is a small spray head which is communicated with a water pipe through a water inlet with a screw thread.
用作握柄的是一根中空细管，清洁头是一个小小的喷头，通过带有螺纹的进水口将其与水管接通。
The utility model discloses an oral cleaning device-a tooth sprayer which is composed of a spray head which is hollow, a water discharge flexible pipe and a clip.
本实用新型公开了一种由喷头，送水软管和夹扣组成的口腔清洁器具牙喷。
The utility model discloses an anti-overflow device for a water bucket, which comprises a drain head, a drain joint, a drain pipe, and a baffle.
本实用新型公开了一种水斗防溢装置，它包含有落水头、落水接头、落水管、闷头。
Water supply pipes are arranged on the slots, and the other end of a drain pipe arranged at the lower part of a larger slot is provided with a spray head arranged in the outlet of the discharge flue.
槽上各设一根上水管，大槽下部所设的排水管另一端设有喷头并置于出口烟道内。
By using this method presented in this paper, not only the optimum design of main pipe net was given, but the water head and flow and pump type were decided.
所提出的方法，不仅能得出一个优化的干管管网，而且还能确定出所需水泵扬程及流量，并确定水泵型号。
The casing is respectively connected with a water inlet pipe and a water outlet pipe, and the front seal head is respectively equipped with a grape juice inlet and a grape juice outlet.
壳体上分别连接有进水管和出水管，在前封头上分别设置有葡萄榨汁进口和葡萄榨汁出口。
The outlets of the cool water delivery pipe and the hot water delivery pipe are provided with a mixer, and a shower head is communicated with a mixing outlet of cool water and hot water.
冷水输送管和热水输送管的出口处设置有混合器，喷淋头与冷、热水的混合出水口连通。
A method of arranging orifices with varied opening area according to the pressure variation in the pipe is suggested in order to ensure the uniformity of water-distribution in the low head fi...
并提出按管内压头来改变开孔面积的布孔方法，以便保证用于低水头滤池时布水的均匀性。
A method of arranging orifices with varied opening area according to the pressure variation in the pipe is suggested in order to ensure the uniformity of water-distribution in the low head fi...
并提出按管内压头来改变开孔面积的布孔方法，以便保证用于低水头滤池时布水的均匀性。
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