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封孔器是干式钻孔除尘系统的关键设备之一。本文论述了自阻力封孔器的结构、工作原理及其所组成的干式除尘系统工业试验情况
Punch is a dry drilling dust removal system, one of the key equipment. This article discusses the structure of self-resistance puncher, working principle and its composition of dry dust removal system industrial test situation