同义词
1)mining method,开采法2)method of working,开采法3)mining system,开采法4)working method,开采法5)working system,开采法6)pressure-release mining method,卸压开采法7)gas-arising exploitation,气举开采法8)underground mining,坑道开采法9)gallery mining,坑道开采法10)underground mining,矿井开采法
