Home / Standards / GBT 20063.13-2009 GBT 20063.13-2009 Graphical symbols for diagrams — Part 13: Material processing apparatus 简图用图形符号 第13部分:材料加工装置 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