| http://www.w3.org/ns/prov#value | - At the same time, a control circuit which is well known, detects the scanning by the scanning laser and, in response to such scanning, controls the movement and duration of an etching laser in step 208 which carves out areas on the surface of a positive plate so that the positive plate will have peaks and valleys which correspond to the halftone image found in the film, such as shown in by the pla
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