Compared with bituminous coal, anthracite coal is much more difficult to take fire and combust completely.

与烟煤相比，无烟煤具有着火难、难燃烬的特点。

youdao

Compared with bituminous coal, anthracite coal is much more difficult to take fire and combust completely.

与烟煤相比，无烟煤具有着火难、难燃烬的特点。

youdao