根据苏联共产党第十九次代表大会关於贯彻符合于目前要求的国家标准的指示,在 1953年及 1954年上半年,由互换性局制定并由苏联国家计划委员会直属标准化管理局批准了一组机械制造中直线尺寸测量工具的主要标准及其他主要规格。 根据使用者对高精度测量工具的要求,大批的同一型 According to the directives of the 19th Congress of the Communist Party of the Soviet Union on the implementation of the national standards meeting the current requirements, in 1953 and the first half of 1954, the Interchange Bureau established and approved by the Standardization Administration of the National Planning Commission of the Soviet Union a group The main standard for linear dimension measuring tools in machine construction and other key specifications. According to the user requirements for high-precision measurement tools, a large number of the same type