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.