| 摘要 |
A casing structure of compressed wood that holds a predetermined object between a plurality of compressed wood pieces, wherein each of the compressed wood pieces has a main surface portion and side surface portions formed integrally around entire peripheral edges of the main surface portion and non-parallel with the main surface portion, and wood fiber directions in the main surface portions of the compressed wood pieces are substantially symmetrical with respect to an opposing surface between the compressed wood pieces.
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