... . 3 Max Width:80cm, . 4 Speed: 50m-500m/hour 2012 Hot Sale Trenching Machine: 1 The features of the machine:1.1 ... machine: Horsepower of auxiliary tractors30-80hpOperation speed50-500m/hPressure of oil tank16MpaTrenching depth0-200cmTrenching width10,16,18,20,22,26,30 ...