| http://www.w3.org/ns/prov#value | - ccurs from the substance under analysis upon exposure to radiation at the exposure wavelength, and that is also not significantly absorbed by the material composing the structure. [0041] ???Material??? as used herein refers to construction materials such as wood, brick, stone, drywall or sheet rock, panels of vinyl or stucco, or other materials used in the construction of a structure such as a bui
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