... filter ontology space down into a box area, each box with 32, 64, 96, 128 a filter bag. Dust-contained ... Pa), clear grey controller start, the first box room the ascension of the valve is closed ... off the gas flow exports. And then this box of the electromagnetic valve opens, pulse valve ... haihua r&d center in gas box based on impulse precipitator launched a cylindrical precipitator, for the domestic ...