parallel algorithm folding method 并行算法折叠方法
folding parallel bars 折叠式双杠
parallel l folding 平行褶皱
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Folding table fixed to the wall, the wall when not in parallel with the folding table, folding table and opened into a vertical wall, without the traditional support device.
折叠桌固定在墙壁上，不用时折叠桌与墙面平行，打开时折叠桌与墙面成垂直状态，无传统的支撑装置。
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