短语词组短语weld arc spot weld 电弧点焊缝weld arc ot weld 电弧点焊缝gas arc tungsten weld 钨极氩弧焊single arc tandem weld 单弧串列焊arc -weld inversion 逆变弧焊arc spot weld [机]电弧点焊;电弧点焊缝plasma arc overlaying weld 等离子弧堆敷arc seam weld [机]电弧缝焊;电弧缝焊缝 返回 arc weld