書見台
書見台を置いてみた。860の高さの机に本を置き、450のイスで本を読むと首の骨が垂直にのびる。疲れない。おすすめである。I set up a bookrest. If you place a book on a desk with a height of 860 cm and read a book on a chair with a height of 450 cm, your neck bones will grow vertically. never tired. Recommended.
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