| 摘要 |
PROBLEM TO BE SOLVED: To make the top face of a lid hard to damage. SOLUTION: A lid 21 for opening and closing an opening 6a on the top face of a washing tub 6 is made by connecting foldably first and second lids 22 and 23, and hard members 22c and 23c are provided on the top face sides of the first and second lids 22 and 23. The hard members 22c and 23 are graining molding of a stainless steel plate and have a pencil hardness of 4H or higher. By forming the top face side of the lid 21 of the hard members 22c and 23c, the top face of the lid 21 can be made hard to damage and can be used easily for placing tableware thereon.
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