定位焊缝 meaning in Chinese

tack weld

Weld positioning under load without installation , seam thickness of the seam thickness of not less than two - thirds of the design , not to exceed 8 mm , should not be less than 25 mm in length weld , located in welds inside
安装定位焊缝不需承受荷载时,焊缝厚度不少于设计焊缝厚度的2 / 3 ,且不大于8 ? ,焊缝长度不宜小于25 ? ,位置应在焊道内.安装焊缝全数外观检查,主要的焊缝应按设计要求用超声波探伤检查内在质量.上述检查均需做出记录