backfill material的用法和样例：
例句
- Preparing high density backfill pulp totally with tailings is one of the challeges in backfilling technology.
利用全尾砂制备高浓度的充填料浆是充填技术中的难点之一。 - The result showed that the backfilling material made with phosphogypsum and fly ash can completely meet the technical demand of industrial fifing.
其试验结果显示，用磷石膏和粉煤灰制作胶结充填料是完全满足现场工艺的要求。
