矿山企业生产模拟
dynamic simulation in mining enterprise production
矿山
mine
mining
mines
Coal
ore
Mined
miner
National
mining industry
ore mine
iron ore mine
mine enterprised
the collieries
mine ecological environment
Mining area
BAL
mining issue analysis
Coal mine
金属非金属矿山
metallic and nonmetallic mine
metal and nonmetal mine mining