backfill material的用法和樣例：
例句
- Preparing high density backfill pulp totally with tailings is one of the challeges in backfilling technology.
利用全尾砂製備高濃度的充填料漿是充填技術中的難點之一。 - The result showed that the backfilling material made with phosphogypsum and fly ash can completely meet the technical demand of industrial fifing.
其試驗結果顯示，用磷石膏和粉煤灰製作膠結充填料是完全滿足現場工藝的要求。
