| http://www.w3.org/ns/prov#value | - A system for plotting a graphic image on a substrate, the system comprising:scanning-head means for directing n beams onto the substrate, each beam having a width w, where n is an integer greater than one and w is a real number greater than zero; first axis translation means for causing relative movement of the scanning-head means along a first axis of the substrate, so that each beam exposes poin
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