| 摘要 |
PROBLEM TO BE SOLVED: To hold the use ratio of a used filter and to reduce an arranging number, an arranging space and the on-off number of times of a lid accompanied by the replacement of a filter. SOLUTION: In a filter equipped with a container consisting of a cylindrical body (vertical body) 1 housing filter elements 4 for treating gas and the upper lid 3 closing the upper opening of the cylindrical body 1, a plurality of the filter elements 4 are housed in the cylindrical body 1 so as to be made detachable by the opening and closing of the upper lid 3.
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