管道中的

AIM: Valved homograft conduit is frequently used to treat complex congenital heart disease and shows a satisfactory short and moderate-term effect, but its long-term effect still needs to improve.

目的：同种带瓣管道已经广泛应用于复杂先天性心脏病的治疗，临床应用中显示了良好的近中期效果，但其长期耐久性还有待提高。

Large numbers of bends and elbow s are required in construction of long distance pipeline with large diameter to suit the pipeline to the hypsography.

在大口径长输管道工程施工中，由于沿途地形起伏变化，需要使用大量的弯管和弯头，为了在施工现场能准确测量弯管和弯头的角度，正确选取弯管和弯头，研制出了弯管角度测量器。

The finite element method is used to simulate transientflow of incompressible viscous fluid in a planar sudden expansionchannel.

0引言在液压传动和控制系统中，突然扩大的管道流动是一种常见的流动现象。

By solving the frequency equation,the relationship between initial stress and phase velocity is obtained.

通过求解考虑初应力时的耦合波动方程，得到了管道壁中应力波传播时相速度和初应力的关系，并进行了实例计算。

The strategic importance of Russia-China crude pipeline system is discussed, and some constructionplans are comprehensively analyzed and compared with the conclusion that the line from Irkutsk through Mongoliadirectly to North China inland has obvious advantages.

论述了俄中原油管道的战略意义，并对建设方案进行了综合比较分析，得出从依尔库兹克穿过蒙古国直插我国华北内陆的方案优势较明显。

The calculation expression of length at entry of velocity boundary layer about laminar and turbulent flow is obtained.

得到了管道层流和紊流时速度边界层入口段长度的表达式，表明比现有教材中所给出的公式数值要小。

In the case of substances known to undergo racemization or mutarotation, care should be taken to standardize the time between adding the solute to the Solvent and introduction of the solution into the polarimeter tube.

对于检测已知具有外消旋或变旋作用的物质，应当小心地采取措施对向溶剂中加入溶质和将溶液加入旋光计管道的间隔时间进行标准化。

All I had to do was file out the small nub that stops the pipes from entering too far.

我只是要做的是文件中规定的小型核心所在，是阻止进入太远管道。

On the base of the hydraulic impulse testing machine model, calculate the pipeline system and other hydraulic accessories' influence on the impulse press.

首先对液压脉冲试验台的压力冲击—水锤进行探讨，了解管道系统压力冲击过程中瞬态流量和压力的变化规律。

This DVD Neil introduces his scuttlebutt for graduation and texturing hornlike opencast models.

在这张DVD中，Neil 介绍了他管道的阴影和纹理的硬表面模型。

The basic concept of FOP can be summarized as to further optimize effective prescription according to the standard of curative effects and with the aid of modern science and technology and theories of traditional Chinese medicine.

其基本内涵可概括为：以确有疗效的中药复方为研究对象，以现代科学技术和传统中医药理论为技术支持，以该复方所治病证的药效响应为评价标准，以优化重组疗效更优的新复方为研究目的。

Ever since our world has been a world, native forests have been indiscriminately exploited by man.

自从我们的世界一直是世界原生森林被任意剥削人。