推进大型煤矿改造，建设高产高效矿井，开发煤气层资源；
We will reform large-scale mines and develop high output and high efficiency mines.
对今后煤矿建设中大型通风机装置的设计提出了建议。
Recommendations of design for large fan unit in coal mine construction from now on are raised.
对今后煤矿建设中大型通风机装置的设计提出了建议。
Recommendations of design for large fan unit in coal mine construction from now on are raised.
应用推荐