短語詞組短語weld -bead movement 焊縫移動(dòng)solidification mode in weld -bead 焊縫結(jié)晶形態(tài)impermeability weld bead 密性焊縫weld bead visual appearance 焊縫外觀形狀weld bead feature group 焊道特征組weld bead shape 焊道形狀;焊縫形貌width of weld bead 焊道寬度weld bead size 焊縫尺寸Weld bead caterpillar 毛蟲 返回 weld bead