| http://www.w3.org/ns/prov#value | - The elongated base or body member A may conveniently be extruded from a suitable metallic material such as aluminum or other metal with wall thicknesses of, for example, around 1/16 or so, and it is comprised of a central longitudinal channel portion 10 opening upwardly and formed by a pair of parallel, vertically disposed opposed side walls 12 and a connecting horizontally disposed bottom wall 1
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