Coaltern.科尔特coaln.煤；木炭vt.烧成炭；供应煤vi.加煤；装煤coal-based liquid fuel煤基液体燃料coal of entering furnace入炉煤coal mine hydraulic prop单体支柱coal-mining subsidence采煤沉陷coal-chemical industry煤化工coal dressing technology选煤工艺coal blending technology动力配煤技术coal analysis laboratory煤质化验室coal mine under villages村庄下采煤coal tar worker's cancer