短語詞組短語weld set up 焊接部件weld back -up 焊縫背墊weld face cleaning up clean 焊接面清理干凈;焊接面清理清潔;韋爾德面對清理干凈up weld 上向焊weld seam fit -up 焊縫組對backed up weld 后托焊接build -up weld 堆焊技術vertical up weld 垂直焊縫sideal weld metal build -up 額外堆焊的焊縫金屬 返回 weld up