poor grade coal的意思|示意
美 / /
英 / /
劣质煤
poor grade coal的网络常见释义
低级煤 ... 低级深熔岩 metatexite 低级煤 inferior coal ;lean coal ;low rank coal ;low-grade coal ;poor grade coal 低级能 low grade energy ...
poor grade coal相关短语
1、 poor-grade coal 劣质煤
2、 use of poor-grade coal 燃用劣质煤