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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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 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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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.

BBC: Domestic water tap