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Air purifiers

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There were made the series of experiments, where the all conditions of "smoked room" were reproduced. Three smokers were placed at the distance of 2 meters from the ion collector. In the first experience each of them smoked one cigar, in the following experiments (in the smoked room) they smoked cigarettes and tobacco-pipe. In each case the smoke was very thick even by visual estimations, and even in some hours the smoke did not completely disapp
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