在厚壁管、压力容器及电站锅炉的窄间隙全位置焊接中，钨极运动轨迹是动态的。
The synthesizing control scheme is put forward based on the requilement of narrow-gap all-position welding technology in terms of the moving track of tungsten electrode.
全位置自动焊接技术的特点是，焊丝可以连续送进，焊丝熔敷速度快，焊接质量较高，尤其适用于大口径、厚壁管的焊接。
This welding process, with continuous welding wire feeding, fast deposit speed and quality welding pass, is especially suitable for long distance pipeline with large diameter and thick wall.
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