Home / Standards / GBT 10609.4-2009 GBT 10609.4-2009 Technical drawings — Requirements for micrographic reproduction originals 技术制图 对缩微复制原件的要求 Standard Type GBT ICS N/A CCS N/A Status N/A Issue Date N/A Implementation N/A Responsible Dept N/A Drafting Unit N/A