Home / Standards / GB/T 223.69-1997 GB/T 223.69-1997 Steel and alloy—Determination of carbon content—Gas volumetric method after combustion in a tube furnace 钢铁及合金化学分析方法 管式炉内燃烧后气体容量法测定碳含量 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