| 摘要 |
PROBLEM TO BE SOLVED: To suppress the generation of structural streaks on the front face of a front cabinet to be the appearance face of a cabinet. SOLUTION: The front cabinet is constructed by connecting four frame members formed by extrusion processing of an aluminum so as to be rectangular. On the inner surface of each member, a projected draw surface having a U-shaped cross section is formed on the root part of a thick rib formed to fasten the frame using corner brackets and tapping screws in order to reinforce each frame and the root part of the rib is formed so as to be a smooth thin part.
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