| 摘要 |
Base structure for seat means including a U-shaped support member having four upright legs defining two substantially parallel planes, said member being secured by connection means to a rigid, substantially horizontal frame member of the seat means. Said base structure and seat means may be arranged to permit stacking. A pair of runners are attached near the central portions thereof to the lower ends of the legs in parallel relationship to each other and transversely of said planes for engagement with a supporting surface.
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