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1、
However, the biosilica obtained by the dry ashing method from rice shells directly is cristobalite silica.
而利用干灰化法从稻壳中直接提取的硅质体是方晶石型的SiO2材料.
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2、
This paper introduces the technology characteristics of cristobalite produced by direct calcination with nubby quartz.
阐述了石英块料直接煅烧法生产加工方石英的工艺特点.
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