| http://www.w3.org/ns/prov#value | - In the illustrated embodiment, a prism is provided and blasted at a prism preparation station 116, where a window or display area in the coating or coatings on the prism is/are mechanically established, such as via sand blasting and/or laser etching or laser ablating the substrate to remove the coatings from the surface of the substrate to form a window or display region in or at the coated substr
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