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- Based on Darcy-Brinkman Model, a theoretical study of laminar film condensation on a vertical tube surface with thin porous coatings was carried on. 假设:(1为无限大空间;(2层流膜状凝结;(3凝结为二维轴对称;(4)凝液与蒸汽之间无两现区;(5)忽略对流项和惯性项。
- This article illuminates the method and application of vertical down welding for gas pipe line,which ensures the welding quality and meets the requirement of pipe design. 对立向下焊接技术的应用情况加以说明,并阐述此方法是如何保证长输管线的焊接质量,满足管道设计技术要求的。
- Daniel's former hairs, vertical down with a touch of the silk, fluttering in the wind, going spiky one by one, taking on the color of flame red, then to golden yellow. 原本向下垂的如丝的直发,如今在风中飘逸,一根一根地变硬,向上竖直,颜色从炙热的火红,到金黄。
- In this paper, the improvement of vertical down welding in piping is introduced and the technology of mixed vertical downwards welding and co - operated vertical down welding are described . 介绍了手工向下焊焊接工艺在长输管道焊接方面的发展,主要叙述了混合型向下焊焊接工艺和复合型向下焊焊接工艺的应用。
- Gets or sets the number of pages displayed vertically down the screen. 获取或设置屏幕纵向显示的页数。
- The human brain is divided vertically down the middle into two hemispheres. 人脑从中央垂直地分为两半球。
- polyethylene terephthalate film condenser 聚对苯二甲酸乙酯薄膜电容器
- The heat transfer of steam in a helically coiled tube with stratified film condensation is investigated theoretically. 对水蒸汽在蛇管内分层流膜状冷凝传热进行了理论分析和实验研究。
- Vertical Down Welding on Pipeline of Lorge Calibre 大口径管道下向焊接
- Single-pipe filling rising film condensation and crystal desalination is a developed process to treat waste sulphuric acid. 单管填料升膜浓缩结晶脱盐法是一种治理废酸液的新工艺。
- Vertical down welding of common electrode 普通焊条向下立焊
- Have a glass of beer to rinse your dinner down. 喝杯啤酒把你吃的晚饭冲下去。
- The machine must break down at this busy hour. 正忙的时候,机器偏偏又坏了。
- Li, G C., and Yang, S. A., 2006, "Thermodynamic Analysis of Free Convection Film Condensation on an Elliptical Cylinder", J. of the Chinese Institute Engineers. 陈柏璁、吴家瑞、杨胜安,2006,“水平圆管上强制对流膜状凝结之熵增分析”,第二十三届机械工程研讨会。
- The old man stared the uninvited guest up and down. 老人把不速之客上下打量了一番。
- Film condensation heat transfer characteristics are studied by numerical simulation for a single horizontal tube in the presence of a non condensable gas. 为查明不凝气体对水平管外膜状凝结换热特性的影响规律,建立了水平单管的气、液双边界层模型。
- vertical down welding technology 下向焊工艺
- Distribute system intelligence vertically down narrow and deep containment hierarchies. 让系统功能在窄而深的继承体系中垂直分布。
- The vertical line meets the horizontal one here. 垂直线与水平线在此相交。
- electrode for vertical down welding 向下立焊条