近十几年来,在美国建筑机械生产中显著地增加了重型施工机械产品数量。美国发展建筑施工机械的主要方向是:1.提高机械的单位功率指标(马力/吨);2.提高运行与工作速度;3.在机械结构中大量应用液压传动,广泛使用优质钢和优质材制造零部件;4.采用流动式技术保养设备,在工地上 In the past ten years, the number of heavy construction machinery products has increased significantly in the United States in the production of construction machinery. The main directions for the development of construction machinery in the U.S. are: 1. to increase the unit power index of the machine (horsepower/ton); 2. to increase the speed of operation and work; 3. to use hydraulic transmission in a large number of mechanical structures; to use high-quality steel and high-quality materials extensively. Manufacturing parts; 4. Using mobile technology to maintain equipment on the construction site