短語詞組短語pitch bead welding 斜坡堆焊焊箍Bead welding overlaying weld 堆焊powder plasma bead welding 粉末等離子弧堆焊bead welding alloy 堆焊合金的tig bead welding tig 堆焊工藝wire feed bead welding 送絲堆焊bead welding materials 堆焊材料bead welding material 堆焊材料 返回 bead welding