The hydrodemolition surface preparation robot from Conjet AB/National Hydro uses high-pressure water to remove damaged concrete. It cleans rebar and leaves a roughed surface for the adhesion of new concrete. The 363 robot with standard arm is 11 feet, 2 inches long and 7 feet, 7 inches tall. It has a wheel width of 5 feet, 10 inches to 8 feet, 2 inches. Weighing 4,410 pounds, it has a removal width of 6 feet, 7 inches. 517/223-0915; www.conjet.com.