双盖板接头    double strapped joint

双重拉伸试验    doucle tension test

出流    down stream

平焊    downhand welding/flat position welding

下坡焊    downward welding in the inclined position

后拖量    drag

下降特性弧焊电源    dropping characteristic arc welding power source

结瘤    dross

干式回火防止器    dry flashback arrestor

干式水下焊    dry method underwater welding

双层气流等离子弧切割    dual gas plasma arc cutting; shielded gas plasma arc cutting

延性断口    ductile fracture

失延裂纹    ductility-dip crack

除尘装置    dust collection device

脉冲焊接电流占空比    duty cycle of pulse duration

着色探伤    dye penetrant inspection

电源动特性    dynamic characteristic

电弧动特性    dynamic characteristic of arc

动态参数    dynamic parameters