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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The materials have a good welding resistance, hence they are the ideal contact materials for automatic switches which require reliable welding resistance as well as long electrical life.

对于既要求有可靠的抗熔焊性又要求有较长电寿命的自动开关。是较为理想的触头材料。

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The cracks produced in the automatic SAW welding test are existed in the weld, and has nothing obviously with WGJ510C2 steel.

WGJ510C2钢在自动埋弧焊焊评试验中所产生的裂纹均在焊缝金属中，与母材没有明显的相关性。

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