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Exercise ball comprises inflated toroidal tube which encloses a central transverse aperture of smaller diameter than that of tube
Exercise ball comprises inflated toroidal tube which encloses a central transverse aperture of smaller diameter than that of tube
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机译:健身球包括膨胀的环形管,该环形管围成直径小于管的中央横向孔
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摘要
The exercise ball (10) comprises an inflated toroidal tube (13). This encloses a central transverse aperture (14) of smaller diameter than that of the tube.
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