| 摘要 |
PROBLEM TO BE SOLVED: To provide a floor capable of reducing the construction cost and also offering a floor having a high degree of freedom for the attaching position of an opening to a room next to a bathroom or a shower room. SOLUTION: The floor of a part of the region facing to an entrance side of the bathtub or shower room is formed with a factory-produced waterproof pan and the remaining portion is formed by the work for floor member on the job site in the configuration.
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