短语词组短語half -bright nut 半精致螺母;半精制螺帽semi -bright nut 半光制螺母semi bright nut 半光制螺母half bright nut 半精制螺帽Bright Mild Steel Hexagonal Nut 光亮軟鋼六角螺絲帽bright mild steel square nut 四方沖光螺絲帽 返回 bright nut