1. Kinematics and Dynamics Analysis of the Shovel Unit of Agricultural Hydraulic Excavator What is the horsepower (H. P) of this engine (tractor, excavator, bulldozer, motor scraper, roller)?
农用挖掘机铲斗机构的多体运动学与动力学研究这台发动机（拉机、掘机、土机、行铲运机、路机）马力是多少？
2. According to the laser sweep horizontal plane the controller makes the shovel which mounted on the shovelling machine or the tractor raise or lower by means of the hydraulic control system. Therefor the land would be automatically levelled out.
以激光扫描平面为参照面，控制箱控制液压系统，使推土机或拖拉机的平铲升高或降低，从而实现了自动化平整土地。