In order to improve the gradation and the quality of the filtering material, both sieved and blasted materials are used.And the quantity of gravel mined decreased.
英
美
释义
根据料场砂砾石级配特点和反滤设计要求,综合利用筛分料和爆破料改善反滤料的级配,进而提高反滤料的质量,同时减少反滤料的开采量。
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