管

This paper analyses axial effort between bend and adjacent straight pipe by integral calculation.In this paper it deduces the computing formula of axial effort,which lays a foundation of stress analysis on bend.

项江从弯管的受力分析入手，通过积分计算，分析了弯管与相邻直管段的轴向作用力，并推出了该轴向作用力的计算公式，为弯管的应力分析打下了基础。

The extensive application of the Numerical Control Bend Pipe Machine is the important craftwork of the tube molding processes. It can be applied in these areas, such as automobile, appliance, light work, aerospace and hot motive...etc.

该三维数控弯管机广泛应用在管件成型工艺中，使用于汽车、空调等行业的各种管件和线材的弯曲。

Company's "Wing" brand stainless steel seamless tube, boiler tubes, three of the tube.

公司生产的&永上&牌系列不锈钢无缝管，锅炉管，三化管。

Since I had the pipe I will use it for the boiler tubes. I've had many different inputs on using pipe vs. boiler tube and also copper tubing.

以来，我有管，我会用它为锅炉管，我已经有很多不同的投入使用管道与锅炉管和此外，铜油管。

After analyzing the performance anduncertainty of the DDPM vortex flowmeter in gas-liquid bubble flows, the vortexflowmeter-Venturi tube combinative method using the vortex flowmeter and the Venturi tube as measuring cells was put forward, the measurement model based on thevortex frequency and the Venturi differential pressure was established, and it showsthat the relative errors of this method for the mass flow measurement of bubble flowsare within±5%. Furthermore, the flowrate and volume void fraction of bubble flowswere obtained using a single DDPM vortex flowmeter through the relationshipbetween the frequency and amplitude of the circumferential DDPM signal, and resultsdemonstrate that the relative errors of the flowrate and volume void fraction of bubbleflows are within±5% and±10% respectively, which indicates the broad applicabilityof this method to large numbers of engineering fields.

通过分析管壁差压式涡街流量计在气液泡状流中的性能和不确定度，提出了以涡街流量计和文丘里管作为测量元件的&涡街—文丘里联合法&，建立了以涡街频率和文丘里差压为被测量的测量模型，该方法对气液泡状流质量流量的测量相对误差可达±5％；通过建立涡街周向管壁差压信号频率和幅度与被测流体的关系，使用单个涡街流量计实现了对气液泡状流流量和体积含气率的双参数测量，该方法对气液泡状流流量和体积含气率的测量相对误差分别为±5％和±10％，可以满足大量工业实际应用的要求。

It measures the space between tube-sheet of upper and bottom in assembly of tube bundle firstly,then unifying the dimension of tubes,finally proceeding with the welding of tubes,which reduces the difficulty of tube bundle assembly and improves work effic.

在管束组装中采用先测量上、下管板间距，再确定换热管长度，然后穿换热管并组焊的工序，降低了管束组装的难度，提高了工作效率。

Pathologic examination included: tubulointerstitial lesion which was the main pathologic presentation, tubular epithelial cell becoming flat, TEC necrosis and wither, departure between the cytoplasm and basis membrane, drops of protein in cytoplasm, broken basic membrane of TEC, inflammatory cells infiltrating in tubulointerstitium, tubulointerstitium fibrosis, plasm cell infiltration.

MM肾损害主要以小管-间质病变为主，病理表现为肾小管上皮细胞扁平，存在不同程度变性、坏死或萎缩，胞浆与基膜分离，胞浆内可见蛋白滴，甚至小管基膜断裂，间质炎性细胞浸润、纤维化，部分有淀粉样物质沉积，较少见浆细胞浸润。

The contribution of water concentration on the growth of carbon nanotubes was investigated. Scanning electron microscopy results showed that the grown CNTs in CH4/H2 gas mixure had chain-shaped structure and the diameter was about 40—90nm. With the addition of proper amount of water, the diameter of CNTs became uniform, and the surfaces of nanotubes were fully covered with nano-sized node-like structures. When more water was added, branched carbon nanotubes were synthesized.

场发射扫描电子显微镜结果表明，不加水时，制备出的碳纳米管直径不均匀，分布在40—90nm之间，呈链节状的结构；加入少量水时，制备出的碳纳米管直径比较均匀，集中在70nm左右，表面为瘤状结构；当水的流量进一步增加时，得到的碳纳米管表面光滑，出现了枝状结构。

The invention provides a method for preparing a tube-shaped cathode of a direct methanol fuel cell, belonging to the fuel cell field and comprising the steps of: dispensing a single solution for gel injection molding at first, then adding a mesophase bituminous coal micro ball into the single solution and stirring evenly to obtain stable slurry, then casting the slurry into a die, preserving heat until the single solution reacts with a cross-linker completely to obtain a carbon-biscuit, after drying and sintering the biscuit in vacuum, preparing a diffusion layer and a catalyst layer on the surface by dipping process, and then coating polyester electrolyte membrane with a burette, rolling the carbon on a warm table to solidify the electrolyte membrane.

一种制备直接醇燃料电池管状阴极的方法，属于燃料电池领域。本发明首先配制凝胶注模用单体溶液，之后将中间相沥青炭微球加入到单体溶液中，搅拌均匀得到稳定的浆料，然后将浆料浇注到模具中，保温至单体与交联剂完全反应，得到炭管素坯，将素坯烘干、真空烧结后，在其表面采用浸渍工艺制备扩散层、催化剂层，然后采用滴管涂覆聚合物电解质膜，在加热台上对炭管进行滚压，使电解质膜固化。

Large-diameter tube of hot-rolled prices basically stable, if the price of cold-drawing tube to maintain the stability of a certain period of time, the second engineer officers are likely to rise, it is estimated or not.

大口径热轧管价格基本稳定，若冷拔管价格维持一段时间的稳定，则大管有上涨的可能，估计涨幅不大。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。