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Coal ash composition analysis is an important item.
煤灰成分分析在煤质分析中是比较重要的项目。
youdao
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A classification table of oil shale ash composition is given out.
提出了油页岩灰分成分的分类表。
youdao
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A classification table of oil shale ash composition is given out.
提出了油页岩灰分成分的分类表。
youdao