短語(yǔ)詞組短語(yǔ)Hollow Steel Section 薄壁型鋼hollow -faced blade section 凹麪翼斷麪hollow section steel fence 空心鋼欄square hollow section columns 方琯柱Square hollow section steel 方琯鋼hollow section steel fencing 測(cè)孔千分尺square hollow section joints 方琯節(jié)點(diǎn) 返回 hollow section