管

Anodized aluminum alloy tube and organic TiO2/ coated aluminum alloy tube are used as the heat exchange tube of horizontal tube falling film evaporator in this experiment,and the effect of seawater flow rate and seawater evaporation temperature on heat exchange property is discussed,as well as the properties of anti-corrosion and anti-scale.

选用阳极氧化和TiO2纳米颗粒填充聚氨酯涂层的铝合金管作为水平管降膜蒸发器的换热管，考察了海水喷淋密度、改性方式、海水蒸发温度对水平管降膜蒸发传热特性的影响，分析了铝合金的耐腐蚀性和抗垢性。

On the basis of NCIDI-designed fire-tube boilers and their operation,and through analysis and comparison, the paper proposes the suitable type of fire-tube boiler for large-size high-parameter sulfur-based sulfuric acid production,and summarizes key points for structural design of critical components.

由于硫磺制酸的炉气清洁无尘，比较适合采用火管锅炉，再加上火管锅炉结构简单、操作方便、运行可靠、运行费用低，特别是中小型火管锅炉的投资比水管锅炉省等优点，所以最近几年来火管锅炉在硫磺制酸上的应用有了长足的发展。

Material is one-time 30~50ml injector 1 pair, one-time glove 1 pair, rubber cap 1 (one-time infusion implement the rubber cap) that go up, the 100~150ml of nose raise fluid that already had had is filled inside clean container, temperature 38~40 ℃. 2 methods little patient takes right skew slope, handlers is abluent both hands wears a glove, open one-time injector, the 50ml injector piston after deciding gastric canal is inside the stomach is abandoned, the tit joins the stomach is in charge of, nose raise fluid is slow enter injector inside, raise gastric canal to come fore-tooth 10~20cm height, have the aid of of fluid of raise letting bazoo is gravitational slowly flow into a stomach inside, warm boiled water rinses conduit after the end, cover with rubber cap finally on the stomach provides terminal. 3 advantages (1) operation goes to the lavatory simply.

为减少误吸的发生，将传统的鼻饲法进行了改良，经临床应用效果满足，现报告如下。1材料一次性30~50ml注射器1副，一次性手套1副，橡皮帽1只(一次性输液器上的橡皮帽)，清洁容器内盛已备好的鼻饲液100~150ml，温度38~40℃。2方法患儿取右侧斜坡位，操作者洗净双手戴上手套，打开一次性注射器，确定胃管在胃内后将50ml注射器的活塞弃去，乳头连接胃管，鼻饲液缓慢倒入注射器内，提高胃管至门齿10~20cm高度，让鼻饲液借助重力缓缓流入胃内，结束后温开水冲洗管道，最后用橡皮帽套上胃管末端。3优点(1)操作简单方便。

Experimental results indicate that the B/A value greatly affects the internal Nusselt number and friction factor of the twisted tube because the parameters decrease with the increase of B/A and S/d values, more rapidly with the former, and that the Nusselt number and friction factor of the twisted oblate tube increase respectively by 30%~150% and 20%~50%, as compared with those of the smooth tube at the same Reynolds number and Prandtl number.

实验结果表明：高扭曲比螺旋扁管的管内努塞尔数和阻力系数均随B/A值和S/d值的增大而减小，但随B/A值的增加而减小得更快，B/A值对高扭曲比螺旋扁管的管内传热与流阻性能影响更大；在相同雷诺数和普朗特数下，高扭曲比螺旋扁管管内的努塞尔数为光滑管的1.3~2.5倍；阻力系数为光滑管的1.2~1.5倍。

The revolution bellows is idealized as a series of conical frusta, joined at nodal circles. The linear finite element analysis equation and the geometrical nonlinear finite element analysis equation in Total Lagrangian Formulation for the revolution bellows are derived using stationary total potential principle.

考虑到油罐刚度比波纹管刚度大的多，将油罐看作为刚体，将波纹管部分和管道部分分别用空间梁单元离散化，通过分析得到波纹管与油罐连接接合面、波纹管与管道连接接合面不同单元之间的位移协调约束方程，并用罚函数法进行处理。

The down tube takes full advantage of the bottom bracket shell's 90mm width, the top and down tubes are pushed right up to the edges of the integrated head tube, and the top tube is fairly broad throughout its length.

在下管充分利用的中轴 shell 的90毫米宽，顶部和下管权推到综合管头部的边缘，而上管是其整个长度相当广泛。

Or, rather, it employs two ring-shaped half-pipes that rotate with respect to one another (the lower one remaining fixed while the upper one revolves along with the building). The joints between the half-pipes have rubber seals to stop the contents leaking, and each half-pipe has a vertical pipe connected to it, to introduce or dispose of the fluid concerned.

或者更确切的说，它使用了两根彼此旋转的环形半管（当上面那根独自围着建筑旋转的时候，下面那根余下的部分被固定），两根半管的接头有橡胶防止泄漏，每根半管都有一根垂直管与之相连，引入或排出附着的液体。

In order to improve the quality of "Xintongda" brand hot-galvanize series products and guarantee to carry out the latest national standard of GB3640-88 and GB/T2518-88, in Beijing and Guangzhou, we have invested large quantity of funds to introduce American Sendzimir hot-galvanize production line to manufacture "Xintongda" brand hot-galvanize series, including hot-galvanize braiding pipe, square pipe, rectangle pipe, circular pipe, wire pipe, electric cable bridge truss, C-steel and strip steel, etc. The products have enjoyed a good reputation for their best quality, various varieties and considerate after-service.

为提高&新通达&牌热镀锌系列的品质，保证产品严格执行GB3640-88和GB/T2518-88最新国家标准，在北京，广州等科研单位的协助下，我们又投入了大量资金，引进了美国森吉米尔热镀锌生产线，从而使热镀锌穿线管，方型管，矩形管，圆形管，线槽，电缆桥架，C型钢及带钢等&新通达&牌热镀锌系列的质量更保证，品质更超群，品种更繁多。

In addition, Ca〓 ionophore A〓 impeded pollen germination and tube growth.

此外，Ca〓载离子体A〓亦抑制花粉萌发和花粉管生长，但与Verapamil和Co〓的效应不同，花粉管生长过程对A〓比花粉萌发敏感得多，表明花粉管中Ca〓极性分布对花粉管生长的重要性。

The FRP tube has a very slippery surface, with roughness rate only 0.009, which is considered as perfect slippery Tube for hydraulic. In daily usage, the wall of the tube of steel, iron or concrete are often corrosive and become rough, while the cross-winding tube can keep a clean and slippery wall surface.

玻璃钢管道内表面相当光滑，一般表面粗糙率可达0.009，几乎可以认为是&水力学光滑管&，在实际运行中，钢管、铸铁管、水泥管等的内表面，经常发生局部腐蚀，变得越来越粗糙，而往复交叉缠绕玻璃钢管道始终保持着新生管表面光滑状态。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。