| 摘要 |
PROBLEM TO BE SOLVED: To provide a sheet suitable for a drainage filter which can prevent the inflow of garbage such as leftover rice and food pieces, hair, etc., from exhaust ports of a kitchen sink, a bathroom, a washroom, etc., into a water pipe, remove slime and odors in the vicinity of the exhaust port and in the water pipe. SOLUTION: A solid chemical which can release an active halogen when dissolved in water is held between nonwoven fabrics to form the sheet for the drainage filter. COPYRIGHT: (C)2004,JPO
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