The LGD812 construction does not use a frame allowing a steel wheel larger than the width of the machine body to be used, which increases the efficiency of the system. The specially designed double articulated structure makes the front wheel stagger the back wheel 200mm. The roller is equipped with an enlarged watering tank, three-stage filtration system and an independent double watering system. The improved braking system guarantees the safety while in operation. While the machine is operating, the static hydraulic brake system makes the machine stop steadily and when urgent braking is needed, just press the brake button. Engine, hydraulic component, electric component are all imported original parts, which ensure the quality and reliability.