GB/T 17739.6-2012 技术图样与技术文件的缩微摄影 第6部分:35mm缩微胶片放大系统的质量准则和控制 Microfilming of technical drawings and other drawing office documents—Part 6:Quality criteria and control of systems for enlargements from 35 mm microfilm
Microfilming of technical drawings and other drawing office documents—Part 6:Quality criteria and control of systems for enlargements from 35 mm microfilm