查询词典 dredge pipe

According to field testing data analysis, the author find out that buried pipe-in-pipe heat exchanger, which act as a important part of GSHP system, can supply sufficient heat flow and its operation performance is better than that of a wind cooled--heat pump. The author also finds out the self-equilibrium mechanism GSHP system operated with buried pipe-in-pipe heat exchanger, which give experiences for design and operation of a GSHP system.

通过实验测试与分析，证明了地下埋管换热器作为地源热泵系统的重要一环能够为热泵提供良好的热源，使地源热泵的性能参数优于风冷热泵，发现了埋管换热器匹配热泵运行时独特的自平衡规律，为设计和运行地源热泵技术提供了经验。

Analysis of pipe burst is one of the important spatial analysis functions of underground pipeline network comprehensive GIS, the thesis puts forward the main assignment of pipe burst analysis, and analyzes the character of the usher nodes and the retral nodes of arborescent pipe network. The paper realizes the valve topological analysis of the pipe network.

爆管分析是地下管网GIS中重要的空间分析功能之一，论文论述了爆管分析的主要任务，阐述了爆管分析的理论模型，分析了树状管网中结点的父结点、子结点的性质，实现了管网的阀门拓扑关系的分析，在此基础上，完成了地下管网爆管关阀分析的算法实现。

PVC pipe,mult-cavity pipe,foaming pipe, enwind pipe

PVC管材，一模多腔管材，发泡管、缠绕管等

The paper studies fault diagnosis technology based on fruticose gas pipe network which is universal in small towns,and gives a particular description of domestic and foreign gas pipe network fault diagnosis technique based on hardware and software currently. The author uses graph theory to build up hydraulic analysis model of natural gas network and presents its solution methods. Besides, the author works out the relation between gas pipe pressure and flux in unsteady condition of fluid flow according to pressure boundary condition and differential equation group, and puts forward fault diagnosis methods and steps of the fruticose natural gas pipe network of middle pressure based on the simplification of this relation.

本文针对小城镇比较普遍的枝状天然气分配管网进行故障诊断技术研究，详细叙述了目前国内外基于硬件和软件的燃气管网故障诊断技术，利用图论理论建立了天然气管网水力分析模型并叙述了其求解方法，根据燃气管内流动的微分方程组和压力边界条件求解出非稳定流动时燃气管道压力和流量的关系，并在对此关系进行简化的基础上提出了基于中压枝状天然气管网的故障诊断方法和步骤。

Steel billets are adopted edition of tran scription or strip steel, steel because of its riveting process does not fall into the stove with the pipe, electric arc welding arc-welded pipe and take the initiative; pipe material and its usefulness is not the same but is divided into: galvanized steel riveting , there is no rust steel riveted steel pipe.

钢管采纳的坯料是誊写钢版或者带钢，钢管因其铆接工艺没有同而分成炉焊管，电弧焊接管和主动电弧焊管；焊管因其材料和用处没有同而分成：镀锌铆接钢管，没有锈钢铆接钢管。

Design of drainage system discharges the way of draining water and the sureness of the system to include; calculation of the water force of the pipeline, mainly includes the design of the crosswise pipe slop and pipe diameter and the design of the vertical pipe diameter; the design of the way of ventilation and the calculation of the ventilative pipe; the design of the inspection shaft to choose the sewage waste water pump.

本建筑为河南省某管理局综合办公楼，对给水排水系统的要求较高。主要设计包括：给水方式的确定，竖向分区的合理划定，管材的确定，管道的水力计算，加压设备和贮水设备的选择计算。排水系统的设计主要包括：排水体制及其排水方式的确定；管道的水力计算（主要包括排水横管的坡度管径的确定，竖管管径的确定）；通气方式的确定以及通气管道的设计计算；集水坑的选择计算并由此选择潜污泵。

Workshop which covers an area of 3000 square meters plot south, with 48 employees, and technical personnel 5 people, with four hot expanding pipe production line, 3 Straightening machine, grinding machine, beveling machine, spray noisy machine; annual production capacity of 10,000 tons, the Company also operates various models of thick-walled seamless pipe, spiral pipe, alloy pipe, large diameter thick-walled tubes.

其中车间占地南积3000平方米，拥有职工48人，技术人员5人，拥有4条热扩管生产线，3台调直机、磨管机、坡口机、喷吵机；年生产能力达万吨，本公司还经营各种型号厚壁无缝管、螺旋管、合金管、大口径厚壁管。

A high-strength steel pipe rockbolt has an expansive rockbolt main body prepared by processing a high-strength steel sheet of 1.8-2.3 mm in thickness with tensile strength of 490-640 N/mm 2 and elongation of 20% or more to a welded pipe and roll-forming the welded pipe to a shaped pipe having one or more concavities extending along an axial direction.

高强度钢管锚杆具有可膨胀锚杆主体，该主体通过下列步骤制成：将抗拉强度为490～640N/mm 2 ，伸长率为20％或更大，厚1.8～2.3mm的高强度钢板加工成焊接管，再将该焊接管滚轧成型成具有一个或多个沿轴向延伸的凹部的异形管。

The result shows: the material of glass reinforced plastic mortar pipe is brittle, the enlaced sample always destroyed along the interface of different layers, but the centrifugal sample destroyed along a breach; the capacity of bearing radial load of enlaced glass reinforced plastic mortar pipe is better than the centrifugal ones, the destroyed forms of them is also different. Secondly, the whole pipe and direct shear friction experiments between glass reinforced plastic mortar pipe and typical soil of Shanghai have been done.

结果表明：玻璃钢夹砂顶管管材属于脆性材料，缠绕式玻璃钢夹砂顶管的材质试样基本沿着层与层之间的分界面破坏，而离心浇铸式玻璃钢夹砂顶管材质试样的破坏是沿着某个滑裂面破坏；缠绕式玻璃钢夹砂顶管的抗径向荷载性能要优于离心浇铸式玻璃钢夹砂顶管，同时两者在径向荷载作用下的破坏形式明显不同。

The friction factor of glass reinforced plastic mortar pipe and typical soil of Shanghai, the develop characters of friction and the effect of injecting slurry on the frictional characters are got through the experiments. The result shows: the ektexine of glass reinforced plastic mortar pipe is slipperier than concrete pipe; injecting slurry could minish the friction between soil and pipe, but the effect of minishing friction is bear

然后通过对玻璃钢夹砂顶管进行摩阻力特性整管试验与直剪试验研究，得到了玻璃钢夹砂顶管外壁、混凝土与上海地区典型土层间的摩擦系数，以及玻璃钢夹砂顶管外壁摩阻力的发展特性，并且分析了注浆

The use of the web to spread fears that flicking the switch on the LHC could create a Black Hole that could swallow up the Earth particularly concerned him, he said.

他说，使用互联网散布恐慌说启动LHC会生成一个可能吞噬地球的黑洞的做法让他感到忧虑。

Not a single word have I written down.

我一个字也没有写下来。