collieryn.煤矿(包括建筑物和设备在内)
colliery ventilation矿井通风
colliery waste piles煤矸石山
colliery environment煤矿环境
colliery working day矿井工作日
colliery working days煤业工作日
colliery gas forecast煤矿瓦斯预测
Colliery of Pingxiang萍乡煤矿
colliery transportation煤矿运输
colliery waste cork brick煤矸石多孔砖
colliery with underground water大水矿井