... without any environmental pollution 2. Mesh plate automatic pull out structure, convenient for observation and ... discharge, the reduction of labor intensity5. Hydraulic control, realize automatic operation 6. This device can be a ... enlarge the area and quicken the speed.9.Automatic hydraulic system, very convenient and efficient. Use scope ... 10, 15, 20, 25, 30, 35, 40, 45,50,60,70,80,90,100,120,140 ...