| http://www.w3.org/ns/prov#value | - Preferably a shelf member 31, 131 or 231, and the associated respective side supports 46, 146 or 246, are coated, by dipping or the like, with a layer of an elastomeric, and also electrically insulative, material, such as a layer derived from a polyvinylchloride plastisol, or the like.
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