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Topcon Positioning Systems’ Millimeter GPS with LazerZone provides accuracy and productivity in grading and asphalt paving. The LazerZone precise positioning grade technology has been expanded to include concrete paving, providing high accuracy grade reference on the entire paving project. Millimeter GPS with LazerZone provides horizontal and vertical accuracies, better than a conventional stringline. The inherent weaknesses in stringlines are set-up mistakes and the lines tend to sag from one stake to the other. Contractors can eliminate stringlines because the LazerZone system can be used on multiple machines and grade checkers. Millimeter GPS with LazerZone also saves an incredible amount of time. There is no need for a lengthy set-up like a conventional stringline.