Home / Standards / GB 5292.5-85 GB 5292.5-85 Chemical analysis method for melted welding fluxes — Determination of iron oxide content by sulfosalicylic acid spectrophotometry 熔炼焊剂化学分析方法 磺基水杨酸光度法测定氧化铁量 Standard Type GB ICS N/A CCS N/A Status N/A Issue Date N/A Implementation N/A Responsible Dept N/A Drafting Unit N/A