短語詞組短語Hollow Square Steel 空心方鋼hollow drill steel bar 中空鑽桿鋼筋Square hollow section steel 方琯鋼hollow selvedge steel roller 空心鋼輥hollow drilling steel 中空鋼hollow drill steel 中空鋼Hollow shaped steel door 空腹鋼門hollow section steel fencing 測孔千分尺hollow selvedge steel rim 空心輪輞 返回 hollow steel