ligniten.褐煤
lignite - tar pitch褐煤柏油脂, 褐煤硬沥青
lignite ancient cavern褐煤古洞
lignite biodegradation褐煤生物降解
lignite-fired burner褐煤锅炉
ligniter cable assembly点火器电缆组件
lignite-distributed area褐煤分布区
lignite containing germanium褐煤含锗
lignite liquefaction light oil褐煤液化轻质油
lignite combustion characteristics褐煤燃烧特性