| 摘要 |
An inflatable fluid pad including an inflatable diaphragm which forms a portion of a toroidal chamber, an inlet for supplying pressurized fluid to the chamber and at least one opening in the diaphragm for permitting pressurized fluid to flow out of the chamber. Cooperating with the opening is means for preventing fluid flow out through the opening when the diaphragm is deflated and permitting fluid flow out through the opening when the diaphragm is inflated.
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