短語(yǔ)詞組短語(yǔ)arch walling support roadway 砌碹巷道arch walling support 碹體支護(hù)yieldable arch steel support 拱型金屬可縮性支架Bolt -arch Combined Support 錨碹聯(lián)合支護(hù)U -steel arch yieldable support 拱形巷道arch support saddle 拱支座ball -arch support 球拱steel arch support 鋼拱支撐Htype steel arch support 工鋼圓對(duì)棚 返回 arch support