Previous studies showed that the municipal sewage with low salinity could achieve self-purification by microbial reactions in sewer.
通过72 h的连续批量实验,分析高盐度生活污水在下水道环境中的主要微生物反应以及这些微生物反应对水质的影响。
An experimental research was carried out to simulate the operating condition of low,middle and high concentration town sewage treatment by activated sludge system in sewer lines and ditches.
采用下水道活性污泥模拟系统处理低、中、高浓度的城镇污水,结果表明:当进水COD分别为200、400及600 mg/L左右,MLSS为3。
City sewers are responsible for water circulation and recovery in a city.
21世纪的城市下水道担负着水健康循环和水环境恢复的重任,应该成为水资源与营养物质循环的纽带,成为绿色肥料与自然能源的基地。
Based on the detailed introduction of research and application of hyperbaric welding repair technology all over the world, the authors think that it is necessary to develop the hyperbaric underwater pipeline repairing system domestically, and analyze the key points in developing this system.
基于对水下破损管道维修方法进行的系统论述,指出水下干式高压焊接维修在国外是一种通用可靠的管道维修技术;基于对世界范围内水下高压干式焊接维修技术的研究与应用情况的全面介绍,指出了自主研制我国高压干式水下管道系统的必要性,并对其中的关键问题进行了论述。
A new technology which firms the underwater pipeline by fiber reinforced mats is put forward.
水下管道所处的自然环境非常复杂,水流将对管道产生各种作用力并且危及管道安全。
The intent of this project is to find a solution of underwater dry maintenance and repairs for underwater pipeline and structures.
“水下管道干式维修系统”是国家“863”高科技项目,该项目旨在为水下管道和结构的干式维修提供技术手段。
Service methods and instrumentation for offshore pipelines are different from those on land because of their vastly differing performance and environments.
"水下管道干式维修系统"是国家"863"高科技项目,旨在为水下油气管道及管桩结构的干式维修提供技术手段。
Mechanic behavior of wall soil and liner of underwater tunnel;
水下隧道周围土体及衬砌变形力学性状研究
Research on the Minimum Rock Cover Thickness of Underwater Tunnel in Alternating Layers of Hard and Soft Rocks;
软硬岩交互地层水下隧道最小岩石覆盖层厚度研究
Shiziyang tunnel on Guangzhou-Shenzhen-Hong Kong passenger-dedicated railway,which has a design speed of 350km/h,is a milestone in underwater tunnel construction in China.
设计时速达350 km/h的广深港客运专线狮子洋隧道,在我国水下隧道建设史上具有里程碑的意义,如何把握该工程的技术难点,适时开展相关科研工作,并采取针对性措施,对提高工程的建设质量至关重要,也为今后高水压、特长水下隧道的建设提供借鉴。
In order to launch rocket-assisted torpedo with submarine torpedo tube,the general scheme and trajectory plan of the submarine-launched rocket-assisted torpedo carrier were presented,and the underwater trajectory mode of this torpedo inclining to leave water and yawing to elude submarine was designed.
为了实现火箭助飞鱼雷采用潜艇鱼雷发射管发射,对火箭助飞鱼雷的水下水平发射的有关问题进行了探索性研究,设计了火箭助飞鱼雷运载器的总体方案并进行了弹道规划,提出了火箭助飞鱼雷倾斜出水并偏航避艇的水下弹道运动方式。
This paper presents a simulation method of a certain air-launched mine′s underwater trajectory based on Matlab/Simulink.
提出了基于MATLAB/S imu link的空投水雷水下弹道仿真方法,分析了特定空投水雷水下运动时的受力情况,给出其水下空间运动弹道的数学模型,利用MATLAB软件强大的求解偏微分方程功能以及其S-function扩展能力,完整地构建了基于MATLAB/S imu link的空投水雷水下弹道仿真系统,并采用此仿真系统对空投水雷在特定初始条件下的水下弹道进行了仿真和分析。
Using the formula, a software for underwater trajectory prediction was programmed.
将无空泡情况下的阻力系数估算公式代入自编的水下航行体弹道仿真软件,计算得到的超空泡航行体全沾湿状态下的水下弹道理论预报结果,与利用模型试验中的实测数据得到的弹道曲线一致性较好,说明数值模拟对超空泡航行体阻力系数的估算基本准确。
On process design and construction technique of launching way of caisson precasting yard;
沉箱预制场水下滑道工艺设计与施工
The sewers discharge out at sea.
下水道的污水排入海里。
a block in the pipe, gutter, drain, etc
阻塞管道、 排水沟、 下水道等的污物
sewer cleasing sludge
从下水道清出的污泥
gulley emptier/sewage equipment
清沟机/下水道设备
The sewer was gorged with rubbish
下水道塞满了垃圾。
The bathtub drain needs repairing.
浴盆的下水道需要修理。
plunge a rod into a blockeddrain to clear it
用棍通下水道使之畅通.
a drain that was jammed By deBris.
被残余物阻塞的下水道
Drains and gutters require to be flushed.
下水道和阴沟必须冲洗。
Mud choked the drainpipe.
淤泥堵塞了下水道.
To clear a blockage from(a drain, for example).
从（如下水道）中排除障碍
The pipe connects with the sewer.
这根管子连接下水道。
The place where a sewer, drain, or stream discharges.
出水口阴沟、下水道或河流排水的地方
A small proportion of the streets were sewered.
一小部分街道铺有下水道。
On upper floors， plugged drains may cause flooding.
楼上堵塞的下水道也许会引起淹水。
The drain is clogged again and there's water all over the bathroom floor.
下水道又堵了，整个浴室地面都是水。
We waste the dirty water by channeling it into the sewer.
我们通过沟槽把脏水排放到下水道中。
unstop a sink, toilet, drain, etc
疏通洗涤槽、 抽水马桶、 下水道等.