封底焊道 sealing run ; backbead ; backing pass 填充焊道 filling bead ; fill bead ; fillingpass ; filler pass 打底焊道 backing weld ; backing run ; backing bead ; backingrunweld ..
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低成本的焊道，与其他焊接过程相比，填充金属的数量相对比较少。
The quantity of filler metal being often much lower than with other welding processes.
整个焊接接头要通过根焊、填充焊和盖面焊来完成，通过试验分析得到各焊道所对应的焊接工艺参数。
The welded joint was completed by root welding, filling welding and cover welding, their welding parameters were obtained from the experimental analysis.
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