Home / Standards / GB/T 14949.7-1994 GB/T 14949.7-1994 Abolished Manganese ores--Determination of sodium and pota-ssium contents 锰矿石化学分析方法 钠和钾量的测定 Standard Type GBT ICS 73.060 CCS D32 Status 废止 Issue Date 1994-01-18 Implementation 1994-10-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A