| http://www.w3.org/ns/prov#value | - In certain applications, the box-like structure is desirably molded of a plastic, such as methyl methacrylate or polyvinyl chloride or the like, which are inherently transparent and accordingly would impart to the ultimate structure an even greater visibility quotient or index as might be necessary or desirable for particular applications; that is, for particular research and/or comparative testin
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