| 摘要 |
A floating body upon which swimmers may rest has an inner central chamber open at its bottom to let in surrounding water, a valved conduit leading from the upper end of said chamber to the outside for letting a swimmer control the amount of water and air in said chamber and thus the amount of submergence of the body and a bolt extending through the center of the bottom of the body to allow an anchor to be attached thereto to allow the rotation of the body in the water, while the remainder of said body is enclosed providing a floatation chamber.
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