短語(yǔ)詞組短語(yǔ)backfilling plate 墊板backfilling bucket 斗式回填機(jī)backfilling finish 背面上漿整理Subsequent backfilling 嗣后充填backfilling E 回填backfilling assemblage 管溝回填隊(duì)stage backfilling 階段嗣后充填gravel backfilling 礫石回填gangue backfilling 矸石充填backfill material 回填物料；填充料 返回 backfilling