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 ...
剧作家奥斯卡.王尔德以他的诙谐短诗着称.The playwright Oscar Wilde was noted for his epigrams.他最擅长的是写抒情短诗.He is at his best in short lyrics.这些短诗是出自书本还是你的灵感突现?Do you get these haikus out of a book or do they just come to you?...