| 摘要 |
PROBLEM TO BE SOLVED: To provide a deodorization/insect-proof lid which avoids the invasion of malodor and insects coming through a drain pipe by covering the bottom of a part of a drain port. SOLUTION: A mounting part (1) is mounted to the part (1) of the drain port, and a lid (2) is opened by water pressure when water is used and closeed by weight applied to a shaft itself when water is not used. COPYRIGHT: (C)2007,JPO&INPIT
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