| 摘要 |
PROBLEM TO BE SOLVED: To provide a strong building panel forming a groove-like section capable of having an equipment storage space used as a heat insulating space, facilitating the processing at a low cost and creating a healthy environment. SOLUTION: The panel is formed of a plurality of wooden plates having the grains of wood on both right and left overlapping by overlapping each other in the direction of the width within a half width of each of the plates to adhere and has the groove-like sections on both sides.
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