短語詞組短語Electric welding melt bead 電銲熔珠welding g bead 銲道welding bead length 銲縫長度Welding bead subsidence 銲縫塌陷strength of welding bead 銲縫強度welding bead structure 銲縫搆造bead welding 珠銲;窄銲道銲接;堆銲;銲接工藝pitch bead welding 斜坡堆銲銲箍Bead welding overlaying weld 堆銲 返回 welding bead