The Aitltrating efficiencies of the minute spiracle ceramic filter trip to carbon monoxide(CO) and acrylonitrile (C 3H 3N) in mainsteam smoke were determinated.The result showed that the concentration of CO and C 3H 3N in mainstream smoke respectively were 35084mg/m 3,5573mg/m 3.Using the filer trip without any filter material else,the concentration of CO and C 3H 3N decreased to 22700mg/m 3,1921mg/m 3.The result suggested that the filter trip is of active significance to...