coalbedn.煤层
coaln.煤;木炭vt.烧成炭;供应煤vi.加煤;装煤
coal pillar design急倾斜煤层
coal gas generator煤气发生炉
coal -field fire煤田火灾
coal liquefied oil煤液化油
coal burning stove煤炉
coal property test煤质检测
coal-refuse fire炉渣发火
coal-gangue pile煤矸石山
coal-forming law聚煤规律
coal beneficiation选煤