作者: Clifford D. Haggard
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摘要: A filter assembly is formed of an impervious elongated tubular housing and member positioned within the housing. In a first embodiment barrier interposed between surface internal adjacent inlet end another second outlet end. embodiment, pleated sheet, pleats being folded at their ends, sheet into frusto-conical shape with conical base secured to interior surface. Air flowing passes through before exiting