| http://www.w3.org/ns/prov#value | - Such optical alignment systems typically utilize a single laser generator that projects a line on a workpiece to indicate the location at which one of the sides of the blade will enter the workpiece and purport to facilitate cutting the workpiece. [0002] Because power saw blades have varying thickness, there is a need for an optical system that may be used to indicate accurately the width of the m
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