This quantitative analysis is of practical significance to all coal conveying systems to analyze the coal dropping from the belts.

此方法对所有输煤系统撒煤的分析都具有借鉴意义。

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At present, however, large amounts of fly ash produced by coal-fired power stations have to be disposed of by long distance, pneumatic conveying systems.

然而，目前燃煤的火力发电厂产生的大量粉煤灰需采用长距离气力输送装置来清除。

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