Home / Standards / GB/T 11848.9-1989 GB/T 11848.9-1989 Abolished Determination of silicon in uranium ore concentrate by gravimetry 铀矿石浓缩物中硅的测定 重量法测定硅 Standard Type GBT ICS 27.120.30 CCS F46 Status 废止 Issue Date 1989-10-21 Implementation 1990-08-01 Responsible Dept 国家标准委 Drafting Unit N/A