| http://www.w3.org/ns/prov#value | - A non-contacting laser gauge for qualifying screw fasteners and the like as described in claim 4 wherein the camera is a chip having nominally the size of the fastener type to be gauged receiving uncollimated light from a laser diode light source forming a silhouette on a sapphire window having equidistant etched marks thereon for scaling, and the fastener is held in contact with said sapphire win
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