| 摘要 |
<p>PROBLEM TO BE SOLVED: To surely prevent breakage and chipping of the wood and its uneven deformation. SOLUTION: The technical precondition of the face structure is to arrange a cover material comprising a resin based or metal based highly rigid material for reinforcing wood on the face. The material covers the almost entire area of the face and a window part of a specified size is provided at a position biased at least to either the left or right hand of the face to expose the wood face flush with the cover material.</p> |
