Home / Standards / GB/T 7731.10-1988 GB/T 7731.10-1988 Abolished Methods for chemical analysis of ferrotungsten--The infrared absorption method for the determination of carbon content 钨铁化学分析方法 红外线吸收法测定碳量 Standard Type GBT ICS 77.100 CCS H11 Status 废止 Issue Date 1988-02-21 Implementation 1989-03-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A