backfill的例句（backfill在句子中的用法）

• tamped backfill 夯实回填土
• Slags containing Mn is used as the roadbed backfill instead of natural clay. 利用含锰废渣代替天然粘土作为路基回填土.
• The upward drift stoping with backfill is a mining method with a widespread use future. 上向进路充填采矿法是一种具有广阔应用前景的采矿方法.
• This article is good for promotion of backfill. 本文对充填技术的推广,具有一定的参考价值.
• At last, some suggestions were raised for the concrete backfill mining. 最后对具体的充填开采方法提出了建议.