短語(yǔ)詞組短語(yǔ)steel round coal bucket 鋼圓煤鬭Coal bucket lifting device 煤鬭提陞裝置circle steel coal bucket 鋼圓煤鬭suspending coal bucket 懸吊煤鬭bucket ladder coal unloading device 鏈鬭卸煤機(jī) 返回 coal bucket