“天然焦”用英语怎么说？

“天然焦”的英语可以翻译为：
dandered coal，blind coal，burnt coal，natural coke

相关问题

“天然焦”造句

但在煤矿生产中却经常是遇到天然焦因瓦斯增大而中止生产的现象时有发生.But during coal mining, often stop production because of gas content in natural coke increase....
- #天然焦
- #造句