目前,世界各主要产煤国家都非常重视薄煤层开采机械化。刨煤机经过三、四十年的实践、改进和发展,特别是西德的长期经验,美国等国家的最近经验,已证明在一定 At present, the world’s major coal-producing countries attach great importance to the mechanization of thin seam mining. After three or four years of plow operation, improvement and development, especially the long-term experience of West Germany, the recent experience of the United States and other countries have proved that in a certain