基本解釋[機] 反鏟詞組短語短語back -acting shovel shovel 反鏟hydraulic back -acting shovel 液壓反鏟backacting shovel更多詞組專業(yè)釋義經(jīng)濟學反鏟鏟土機能源科學技術(shù)反鏟挖土機