Home / Standards / GB/T 46050-2025 GB/T 46050-2025 Active Manganese and chromium ores—Experimental methods for checking the precision of sample division 锰矿石和铬矿石 校核样品缩分精密度的试验方法 Standard Type GBT ICS 73.060.20 CCS D32 Status 现行 Issue Date 2025-08-29 Implementation 2026-03-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A