... proportional infinite displacement, auto-leveling system, automatic-controlled conveyors As the smallest full-hydraulic-driving ... -electric proportional infinite displacement, auto-leveling system, automatic-controlled conveyors & augers, and gas-heated hydro ... Gas HeatingAuger and Conveyor Control Automatic Control by Ultrasonic SensorsAutomatic Leveling Control Simulation Control Asphalt Paver (RP451)