| http://www.w3.org/ns/prov#value | - Fluid is contained within the cavities and passageways in such pressure and amount as to cause bulges below the normal bottoms of the sole and heel, whereby at rest a foot on the sole and heel is cushioned comfortably on the fluid in the bulges, and in walking and running, fluid under bulge producing pressure alternates through the passageways between the cavities, producing shock absorption and a
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