所有的煤都用电动传送带从工作面运出来。

All coal was moved from the work face by electrically-driven conveyors.

youdao

所有的燃煤都是从燃烧床的下部进入燃烧炉。

All the coal is injected in the lower part of the bed.

youdao

所有的燃煤都是从燃烧床的下部进入燃烧炉。

All the coal is injected in the lower part of the bed.

youdao