| 摘要 |
PROBLEM TO BE SOLVED: To eliminate the flapping after construction, prevent the breakage by a person getting thereon during construction and after construction, and enhance the designing property and waterproofing property of a finished roof. SOLUTION: A hard roof material A having a cushioning material C formed on at least a part of the reverse side of a body B is formed corresponding to the difference in level of a roof bedαhaving a difference in level.
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