Home / Standards / GBT 24743-2009 GBT 24743-2009 Technical product documentation — Representation of heat treatment for steel parts 技术产品文件 钢铁零件热处理表示法 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