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METHOD OF FABRICATING A SELF-RIGHTING CORE FITNESS BALL AND CORE FITNESS BALL
METHOD OF FABRICATING A SELF-RIGHTING CORE FITNESS BALL AND CORE FITNESS BALL
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机译:制造自动扶正核心健身球和核心健身球的方法
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摘要
A core fitness ball includes an inflatable ball and a metal bung within the interior of the ball. The ball further includes a target on an outer surface thereof which designates body positioning information for the user.
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