实践表明，改造后使用JFDI-3048弛张筛进行干法筛分其综合性能明显提高，经济效益显著。
The practice shows that the comprehensive performance of JFDI-3048 flip-flop screen dry sieving is improved significantly after transformation and the economic benefits are increased.
潮湿细粒煤炭干法深度筛分是筛分技术急需解决的问题。
It is an exigent problem to solve the dry deep screening of moist fine coal.
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