| 摘要 |
PROBLEM TO BE SOLVED: To allow easy, repeated, and domestic cleaning of a bath boiler by a user though it used to be performed only by a disposal method with a disposal chemical by a chemical method. SOLUTION: A valve provided in the middle of a hose prevents the back-flow of waste water. Air bubbles are produced inside the bath boiler by blowing air through the hose by a human being, and the inside of the bath boiler can be cleaned by utilizing the buoyant force of the air bubbles. COPYRIGHT: (C)2003,JPO
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