Short of replacing the entire water main, which is both expensive and disruptive, the only way to cut background leakage below these levels has been to reduce the water pressure.
由于费用昂贵而且破坏性大，没有人对水管进行彻底更换。减少底面渗漏流量的唯一办法就是降低水压。
The main loads such as the water pressure, the sand pressure, the uplift pressure and so on are carried on by both the gravity wall and the rockfill body.
库水压力、淤沙压力和扬压力等主要荷载由重力墙与堆石体共同承担，重力墙与堆石体互相支撑，维持稳定。
The main loads leading to collapse of dangerous rock are gravity, water pressure and earthquake force.
重力、水压力、地震力是危岩崩塌的主要荷载。
In most cases, low water pressure is the main reason for irrigation problems.
在大多数情况下，低水压是灌溉问题的主要原因。
Adjust the cooling water flow, to avoid the main engine surge or condensation pressure is too high.
调整冷却水流量，避免主机出现喘震或者冷凝压力过高。
The principle of the main parameter of dynamic compaction strengthening depth, tamping energy water pressure of the hole are studied in a project.
结合工程实例，对强夯主要参数加固深度、单位夯击能、孔隙水压力、夯点间距、夯点复夯等的确定原则进行了分析探讨。
It is indicated that the main factors affecting low permeability gas reservoir are stress action, start-up pressure gradient, permeability, slippage effect, and water blocking effect etc.
结果表明影响低渗气藏的主要因素有应力作用、启动压力梯度、渗透率、滑脱效应、水锁效应等。
Seismic-induced pore water pressure and effective stresses in the saturated porous seabed under seismic loading are the main factors that govern the overall stability of submarine pipelines.
地震荷载作用下海床中的孔隙水压力与有效应力是影响海底管线稳定性的主要因素。
Through the analysis and comparison of water pressure chart of press boiler and no-press boiler, it is found that their main difference is circulating pump delivery, namely different consumption.
通过对无压锅炉与有压锅炉供热系统水压图的分析和比较，发现二者的主要区别在于循环水泵的扬程不同，即循环能耗不同。
It is found that the situation near the soil pipe laying and the water pressure in pipe are the main factors.
经过研究发现，管道埋设附近的土质情况和管道的供水压力是主要因素。
Essentially the main mechanism of deformation and failure of rock mass induced by earthquake is the coupling effect of shear stress and excess static pore water pressure accumulation.
地震作用导致岩体变形破坏的主要机制是剪应力积聚和超静孔隙水压力累积效应的耦合作用。
In this paper the application of high pressure water jet technology in coal mine main drainage pipeline is discussed briefly.
简要探讨了高压水射流清洗技术在煤矿主排水管道清洗中的应用。
Oilfield water injection is the main way to keep the reservoir pressure, and to reduce the crude oil decline.
油田注水是保持油层压力、降低原油递减率的主要措施，注水泵机组是油田注水的关键设备。
The Pandaoling tunnel is the longest non-pressure diversion tunnel of the main channel from Datong river to water irrigation project at Qinwangchuan region.
盘道岭隧洞是引大入秦灌溉工程总干渠上最长的无压引水隧洞。
The gravimetric observation curves at Chengdu Standard Station showed significantly annual variation period, with air pressure and ground water being main interference factors.
成都基准台的重力观测曲线具明显年变周期，其干扰因素主要为气压和地下水。
Through calculation of concrete instance, it is clear that coal mine main drainage pipeline cleaning by high pressure water jet has remarkable economic benefits.
最后通过对具体实例的计算，说明了清洗煤矿主排水管道具有显著的经济效益。
Result showed that main reasons on ablation of roll bearing were transformation of forward Angle, flow value of cool water, water pressure, water pipe position, and deformation of roll-shell et al.
对造成轧辊烧轴承的原因进行了分析，结果表明：轧辊烧轴承主要与轧辊送进角的变化，冷却水的水量、水压及水管位置，轧辊架变形情况等有关。
The problems of eco-environment of Shiyang valley are serious. The main factors of them are high pressure of population to environment and irrational utilization of water resources and so on.
石羊河流域生态环境存在着严重的问题，主要是由于人口对生态环境的压力过大、水资源利用不当等因素引起的；
Fluid pressure pulse is one of the main noise source in water piping system, mufflers are widely used to restrain pressure pulse.
在海水管道系统中，由泵、阀门、弯头等元件引起的压力脉动(即流噪声)是主要的噪声源，消声器被广泛应用于抑制流体压力脉动。
Before proceeding with the installation, close the main water supply valve, open a water faucet to relieve the house pressure and then close the faucet.
在安装热水器之前，关闭主供水阀门，打开水龙头将住宅内的水压释放掉，然后关闭水龙头。
The intermittent supply mode in water supply system will lead to negative pressure in the main pipe, and the same phenomenon also exists in long downcomers of elevated basin (reservoir).
供水系统间歇式供水方式会造成主管道内部产生负压，高位水池(水库)供水管道很长时也容易产生负压。
The main features of high pressure water centrifugal descaling system is analyzed and its working principle is described in this article in the examples of actual application.
分析离心式高压水除鳞的主要特点，并结合实例说明离心式高压水除鳞的工作原理。
According to the welding properties of P91 and C12A steels, the paper presents a welding solution to assemble C12A water pressure valve to P91 main steam pipe in field.
根据P 91和C12A钢的焊接性能，提出了现场中在P 91主汽管道上加装c 12 A水压闸阀的焊接工艺措施。
The main systems, such as power system, water system, hydraulic system, electric and control system, in high-pressure water wagons are studied in the article.
对高压清洗车的主要组成部分，包括动力系统、水系统、液压系统、电控及操纵系统等进行了研究。
The mechanism of the water hydraulic piston pump's noise is analyzed, and it present that the pressure fluctuation is the main factor of the noise in fluid distribution process.
分析了水压柱塞泵的噪声产生机理，指出压力波动是配流噪声的主要因素。
Cooling water pressure fluctuation may suddenly occur when a certain loading was reached during the high loading operation of main engine for a ship.
某轮主机进入高负荷运行，达到某一负荷时会突然出现冷却水压力波动。
Because of fast close of speed open-shutter, the shocking pressure is produced in supply water pipe, This is the main causes of break of supply water pipe and its sleeve.
在洪水管路中，由于快速开闭器的速关而产生的冲击压，是供水管路和接头破裂的主要原因。
As guided needle valve system is greater than the amount of water displacement, the main valve pressure drop in the control room.
由于导阀系统排水量大于针阀的进水量，主阀控制室压力下降。
The main patterns of substance transport between shale and water based mud under low pressure are flow and diffusion.
常压下页岩与水基泥浆之间的物质迁移中主要以流动和扩散方式进行。
In front of the feed water regulator, split, economizer, superheater export, between superheater outlet and main steam valve, to heat the import and export, all should be installed pressure gauge.
在给水调节阀前、可分式省煤器出口、过热器出口、过热器出口与主汽阀之间，再热气进出口、都应装设压力表。
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