随着煤阶的降低，得到的无灰煤中轻组分含量增加；

With the coal rank reduced, the light component content of the ash-free ash obtained would be increased.

youdao

随着煤阶的降低，得到的无灰煤中轻组分含量增加；

With the coal rank reduced, the light component content of the ash-free ash obtained would be increased.

youdao