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 ...
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 ...
The jet-setting couple made frequent appearances in the gossip columns.这对穿梭于各国的富豪夫妇经常出现在八卦专栏。Tramp, tramp , tramp , columns of militiamen marched by in perfect step.一队队民兵欻欻地走过去,非常整齐.The dome was supported by white marble...
William Herschel of England discovered Uranus in 1781.英格兰的威廉·赫歇耳于1781年发现了天王星.The Minnesota Vikings signed Herschel Walker from the Dallas Cowboys...明尼苏达维京人队签下了来自达拉斯牛仔队的赫舍尔·沃克。The Minnesota Vikings signed Herschel Walker ...