subbituminous
1. subbituminous coal
亚烟煤
2. Keywords low rank coal;classification;subbituminous coal;
低煤阶煤;分类;次烟煤;
3. Keywords lignite;subbituminous coal;retorting;pyrolysis;moderate gasification;
年轻煤;低温干馏;固体热载体;温和气化;