size classification of coal
size classification of coal
煤粒度分级
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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The problems in controlling upper size and lower size of feed into an air solid fluidized bed were discussed, and then an air classification technology of moist raw coal was introduced.
讨论了空气重介流化床分选对入料粒度上下限的控制方法和存在问题，介绍了潮湿原煤空气分级新方法。
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