管线

Trenchless technology, which developed in recent years, is a new construction technology of underground pipelines.

非开挖技术是近年来发展起来的一项地下管线施工新技术。

But for some reason, there are some questions in underground pipelines management.

但是目前因种种原因，城市地下管线的管理存在若干问题。

This article discusses the strengthening on the centralized management and development and using of city underground pipelines.

本文就加强城市地下管线集中管理和开发利用进行探讨。

Taking the long-distance pipeline between Zhongyuan and Qingdao as an example, it is analyzed the means and the deviation during remeasuring the length of the pipeline.

文章以中原－青岛天然气长输管道为例，对测量手段、偏差进行了分析，提出了较合理的数据调整方法，并对管线长度测量新方法进行探讨。

A method for the calculation of the ground potentials when the telecommunication equipment and other ground pipes buried metal pipes or metal sheathes of cables are influenced by the resistive coupling is suggested .

分析了层式土壤情况下强电系统与通信系统间的阻性耦合特性，给出了通信设备及其它地下金属管线或埋电缆的金属屏蔽体遭受阻性耦合影响时的地电位计算公式。

In allusion to the corrosion of different injected water sources to the steel part of line and pump and so on in the processof oilfield waterflood development, the corrosion of dissolved oxygen, pH value, sulfureted hydrogen and salinity in the injected waterto steel was experimented and researched by the test of measuring average corrosion percentage in the laboratory.

针对油田注水开发中不同注水水源对管线、泵等钢材质部位的腐蚀，在实验室通过平均腐蚀率测定试验，对不同水源中的溶解氧浓度、pH值、硫化氢含量和盐的矿化度等因素对钢材的腐蚀进行试验研究。

As a result of the above actions, safety for people working for the Common Ducts and those civilians live and work along the vicinities of the path of the Common Ducts will be assured.

如此来确保共同管道内部维护人员的生命安全、及共同管道维生管线设备的正常运行外，也能确实保障都市居民的维生与生命财产。

Please connect the air line to the casing stabbing board.

请接好套管扶正台的气管线。

Connect the air line to the casing stabbing board.

接好套管扶正台的气管线 gdkl，z3N3

ARSX / ARSH series of micro-exhaust valve ARSX / ARSH series in general, the water contains about 2VOL% of dissolved air in water during the air released from the water constantly, gathered at the high point of pipeline, and forms Air Bag to make water Plug Valves With Single Or Double Flush more difficult, the system's water capacity could be reduced by about 5-15%, therefore.

ARSX/ARSH系列微量排气阀ARSX/ARSH 系列在一般情况下，水中约含2VOL%的溶解空气，在输水过程中，这些空气由水中不断地释放出来，聚集在管线的高点处，形成空气袋使输水变得困难，系统的输水能力可因此下降约5-15%。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。