短語詞組短語arch walling support roadway 砌碹巷道arch walling support 碹體支護yieldable arch steel support 拱型金屬可縮性支架Bolt -arch Combined Support 錨碹聯(lián)合支護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 工鋼圓對棚 返回 arch support