n. bottom ash
建筑工人正在给墙抹底灰。
煤中汞在锅炉飞灰中被富集,在底灰中被分散。
In coal, the mercury is concentrated in fly ash from boiler and dispersed into bottom ash.
锅炉底灰是一种良好的吸附材料,可用作废水处理的吸附剂。
Boiler bottom ash is a kind of effective adsorption materials, it can be used as adsorbent to treat wastewater.
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