Brief instruction is given to principle of pipeline automatic welding in all positions, types and character of welding torch swing methods.

并简要介绍了管道全位置自动焊原理、焊枪摆动方式和特点。

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Relationship and importance between pipeline automatic welding in all positions and the types of bevel are analyzed in the view of welding quality, efficiency and economy character.

从焊接质量、焊接效率和焊接经济性等方面分析了管道全位置自动焊与坡口型式的关系和重要性。

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