| 摘要 |
PROBLEM TO BE SOLVED: To provide a seat cushion frame designed to be lightweight making a cross member of square pipe small in wall thickness and thin, while securing enough strength. SOLUTION: The cross member 13 of square pipe is integrally assembled to between the rear ends of both frame sides 14 and 15 in a manner that the cross-sectional main axis Z-Z becomes either perpendicular or near perpendicular to the belt anchor insertion direction F.
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