金属加工机床(包括金属切削机床和金属成形机床)是构成制造工业的基础装备。机床拥有量及其技术构成和技术水平,直接影响机械工业的制造水平和国民经济的发展。为此,各国都非常重视机床拥有量的现状,定期进行全面的调查和分析。如美国从1925年开始,每五年左右进行一次普 Metalworking machine tools (including metal cutting machine tools and metal forming machine tools) constitute the basic equipment manufacturing industry. Machine tool ownership and its technical composition and technical level, a direct impact on the manufacturing level of the machinery industry and national economic development. To this end, all countries attach great importance to the status quo of machine tool ownership, regular comprehensive investigation and analysis. Such as the United States from 1925 onwards, once every five years Pu