Home / Standards / GB/T 20451-2006 GB/T 20451-2006 Active Test method for ball-pan hardness of activated carbon 活性炭球盘法强度测试方法 Standard Type GBT ICS 65.050;65-050 CCS B73 Status 现行 Issue Date 2006-07-12 Implementation 2006-12-01 Responsible Dept 国家林草局 Drafting Unit 国家林草局