Process of manufacture of welding production of ultra polygon round pipe is presented.

介绍了超多边形圆管的焊接生产加工工艺。

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It focuses on the manufacture process and application properties to analyze the advantage and disadvantage of coating plastic pipe and lining plastic pipe.

着重从制造工艺和使用性能方面分析了涂塑钢管和衬塑钢管各自的优、缺点。

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Therefore, this article studied the reliability problems involved in the process of design and manufacture of intelligent drill pipe from both the theoretical and experimental aspects.

因此，本文针对智能钻杆设计和加工中所涉及的可靠性问题，分别从理论和实验两个方面入手进行了研究。

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Therefore, this article studied the reliability problems involved in the process of design and manufacture of intelligent drill pipe from both the theoretical and experimental aspects.

因此，本文针对智能钻杆设计和加工中所涉及的可靠性问题，分别从理论和实验两个方面入手进行了研究。

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