The processing, production equipment, main technical points and dosage design of double wall corrugated PVC pipe are introduced, and the results of faults and its solutions in production are analyzed.
介绍了生产聚氯乙烯（ PVC）双壁波纹管的工艺流程、生产设备、工艺控制要点及配方设计，分析了生产中出现故障的原因，并提出解决措施。
And then, it is discussed that there are not only one symmetric solutions in the sudden-expansion flows of open channel and round pipe.
同时，讨论了明渠突扩流动和圆管突扩流动中存在的不止一个对称解问题，并就此问题未被重视的原因进行了初步分析。
Some problems, such as serious pipe corrosion and unstable acid-base property, and the solutions are presented.
提出目前存在着管线腐蚀严重、水的酸碱性不稳定等问题及解决的方法。
The pipe division has operated in the water - supply industry for over a century, providing comprehensive expert solutions that meet the highest possible demands.
管道系统部服务于水工业已超过一个世纪了。它提供全面专业解决方案以满足最高要求。
A numerical solutions of quasi-two-dimensional unsteady flow of non-Newton fluid in the arterial pipe system is obtained by finite difference method.
利用有限差分方法得到了动脉管系内非牛顿流体的准二维不定常流动的数值解。
The reliability evaluation model of software of quality assurance for pipe support plate manufacturing using fuzzy analytical hierarchy process is developed. The solutions of an example are given.
用模糊层次分析法建立了管子支撑板制造质保软件的可靠性评估模型，并以实例求解。
Exposed flange faces and pipe threads shall be protected from chemical solutions.
暴露的法兰面和管螺纹应保护好，以避免受到化学溶剂的腐蚀。
Exposed flange faces and pipe threads shall be protected from chemical solutions.
暴露的法兰面和管螺纹应保护好，以避免受到化学溶剂的腐蚀。
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