| 摘要 |
PROBLEM TO BE SOLVED: To provide a barrier-free unit bath whereon a large-sized tile or large- sized stone is stuck by being taken as a facing material for the floor formed in a shape having multiple surfaces different in drainage slope. SOLUTION: The tile, the stone, or the like having a triangular or trapezoidal shape is used along a joint surface joined in an inclined state in order to use the large-sized tile or the large-sized stone without forming a space part between the stuck tile or the stuck stone and a floor surface for the purpose of forming the barrier-free unit.
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