The obtained achievement in building material industry is studied, including sintering cement with substituting coal by cokeite and smelting rockwool with substituting coke by cokeite and so on.
本文介绍
采煤副产品~天然焦

,并对其在建材
业
开发研究成果

评述.主要包括天然焦代煤烧制水泥,天然焦代焦炭熔制岩棉等。
英语九年级(全一册)(人教版新版)



、瓦片、烟筒的


