| http://www.w3.org/ns/prov#value | - (a) a resilient foam body having a rear surface defined by a rear periphery and a working surface defined by a working periphery, the rear surface and the working surface being substantially orthogonal to the axis, the working surface spaced from the rear surface along the axis, the body including a peripheral surface extending between the rear periphery and the working periphery, the peripheral s
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