采煤方法及工艺是高产高效矿井建设的核心。
Coal mining method and technics are core of high production and efficient mine's building.
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.
采煤机是综采工作面生产原煤和实现高产高效矿井的主要设备。
The homemade shearer is a main implement equipment of mine of high yield and efficiency in working face of production coal.
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