| 摘要 |
A cigarette holder with a filtering means capable of chemically denaturing such harmful substances as nicotine, tar and the like and particularly carbon-monoxide gas contained in cigarette smoke to harmless substances, in addition to mechanical trapping of them. The filtering means contains hydrogen peroxide solution preferably of a concentration in a range of 0.5 to 3% and an amount in a range of 0.1 to 0.3 c.c. for achieving the chemical denaturalization.
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