Three-way or four-way round pipe welding is a common technique in practice.

将圆形管件焊接成三通、四通等是焊接行业经常遇到的工艺。

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It introduces the change methods of typical round pipe changing into triangle and multi side pipe.

介绍了典型的圆管变三角形及多边形型材的变形方法。

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Based on the law of energy conservation, the velocity expression of the abrasive flowing along the wall of the round pipe is derived.

根据能量守恒定律，推导出磨料在圆管边壁处的速度表达式。

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In many cases, that means replacing a round pipe with a wide concrete box-like structure.

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She said teams had been working round the clock to repair the water pipe and to maintain supplies.

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