Home / Standards / GB/T 7731.12-2008 GB/T 7731.12-2008 Active Ferrotungsten - Determination of sulfur content - Infrared absorption method and combustion titration method 钨铁 硫含量的测定 红外线吸收法和燃烧中和滴定法 Standard Type GBT ICS 77.100 CCS H11 Status 现行 Issue Date 2008-05-13 Implementation 2008-11-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A