管道

And accumulated the rich expexience,urged the polyethylene tabing to ocapy the quite impoxtant position in the construction for the drainage charnel preject in And forms one kind of irresistible development tendency.

PE100管是采用先进的生产工艺和技术，通过热挤塑而摘要：聚乙烯（PE100）管材在建筑中的设计理论和施工技术等方面取得了很大的发展和完善，并积累了丰富的实践经验，促使聚乙烯管材在建筑给排水管道中占据了相当重要的位置，并形成一种势不可挡的发展趋势。

After we successfully create the child process, we must close the write end of the pipe.

在成功创建了子进程之后，我们必须关闭管道的写端。

The chironomid larvaes enter the watersupply system through transmission pipeline.

水源中的红虫随输送管道进入给水系统，其在给水处理系统中繁殖并进入管网，对水质感官指标造成了重要影响。

By application in one large ethylene engineering,it was demonstrated that the welding procedure of chrome molybdenum alloy steel was right and rational,at a greater degree,it improved the welding quality and decreased defects in the welding process.

通过在某大型乙烯工程施工中的实际应用，验证了此铬钼合金钢焊接工艺是正确合理的，能够较大程度提高管道焊接质量，减少焊接时各种缺陷的产生。

So-called aerosol can lines integrate every processing stage for the production of cans or tubes – from aluminum coil or circular aluminum blanks to the finished packaging product.

所谓的气雾罐线结合起来的罐或管道每年生产加工阶段-从铝卷或圆形铝合金毛坯到成品包装产品。

The following are the expressionsfor the mean pressure set up at the detection plate and for the time of the signal toprogagate from the radiator to the detector:这里是1个公式,省略） where Re is the real part of the expression appearing within the braces, 0 is the density ofthe medium, vo is the amplitude of the vibrational velocity, c is the speed of sound in themedium, d2 = I +(r/zcos 8, z is the distance between the emitting and receiving plates, B is the angle between the axis of the acoustic channel andthe axis of the tube, r = vro/c, v is the flow speed of the fluid, d is thediameter of the pipe, m is the circular frequency, k is the wave number,where a is the radius of the plate (this is taken as the same for the emitting and receivingplates for simplicity, but there is no difficulty in discussing plates differ~mg in radii),,~ is the vibrational frequency of the emitting plate, andThe triple sums in the expressions for N~ and N2 may be neglected if the flow speed islow, since the contributions for these become negligible.

以下是表达式平均压力为定于检测板和为信号时间progagate从散热器到探测器：（这里是1个公式，省略）假如再是出现在大括号表达式的实部，0是密度中期，沃是速度的振动幅度，C是健全的速度中，D2中=我+的导向8，z是对之间的距离发射与接收板，B是声之间的通道轴角该管的轴，R =中心内大多分为/荤，v是流体的流动速度，，D是管道直径，m是圆频率，k是波数，的其中一盘是半径（这是为重点，同样的发射与接收为le简单板，但没有讨论板的困难，在半径不同毫克），，是发光板振动频率，和在N的表达式的三重总结和N2可以忽略，如果流速低，因为这些变得微不足道的贡献。

The study of the flow of power-law fluid in a helical pipe with circular section with perturbation method.

采用摄动方法研究了圆截面螺旋管道内幂律流体的流动。

The flow of power-law fluid in a helical pipe with circular section has been studied using perturbation method.

采用摄动方法研究了圆截面螺旋管道内幂律流体的流动。

The isothermal time independent flow for power-law fluid in a helical pipe with circular section is studied with theoretic method and numerical method in the paper.

本论文在前人工作的基础上，采用理论方法和数值计算方法研究了幂律流体在圆截面螺旋管道内的等温定常流动。

By the analysis of stress distortion of circular load symmetry flat plate, starting from the entire deriving course of thickness calculation formula, derives the simple formula of calculating blind flange thickness, which is fit for oral calculation of hydrostatic pressure testing of in-situ equipment and pipeline.

通过对对称载荷圆形平板的应力变形进行分析，从其厚度计算公式的整个推导过程入手，归纳整理出适合于施工现场设备及管道等试压时，所需的盲板厚度的简易计算公式，使其达到现场口算化。

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。