工程机械是实现施工高速度、高质量、低成本、高效益的重要手段。它广泛应用于国民经济各部门。世界各国历来都十分重视工程机械的发展。战后,日、法、美、西德、英等国工程机械年平均增长率分别达到29.1%、15.9%、12%、11.9%和9%。这是各国机械工业中,其它行业所不及的。我国工程机械行业虽然起步较晚,但发展 Construction machinery is an important means to achieve high speed, high quality, low cost, and high efficiency in construction. It is widely used in various sectors of the national economy. Countries all over the world have always attached great importance to the development of construction machinery. After the war, the average annual growth rates of construction machinery in Japan, France, the United States, West Germany, and Britain reached 29.1%, 15.9%, 12%, 11.9%, and 9%, respectively. This is not the case in other industries. China’s construction machinery industry started late but developed