| http://www.w3.org/ns/prov#value | - The rooflight proper and its associated frame are in the case of FIGURE 1 shown mounted in position upon an upstand constructed from four components 11 each extruded from aluminum or other suitable metal, the walls diverging in a downward direction and terminating in a substantially horizontal roof engaging part 12 which is screwed as at 13 to the upper surface of the roof.
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