Home / Standards / GB/T 12714-2009 GB/T 12714-2009 Active Americium-241 Beryllium neutron sources 镅铍中子源 Standard Type GBT ICS 27.120.99 CCS F51 Status 现行 Issue Date 2009-03-13 Implementation 2009-11-01 Responsible Dept 国家标准委 Drafting Unit N/A