| http://www.w3.org/ns/prov#value | - BRIEF DESCRIPTION OF THE DRAWINGS [0023] The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings in which: [0024]FIG. 1A is s schematic drawing of a prior art illustrating the principle of an existing reflectometer; [0025]FIG. 1B is a detailed drawing of a small view
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