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