backfill造句

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.

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.

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.

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.

tamped backfill
夯实回填土

• #backfill