Home / Standards / GB/T 28702-2012 GB/T 28702-2012 Active Nodularizer for spheroidal graphite cast iron 球墨铸铁用球化剂 Standard Type GBT ICS 77.100 CCS J31 Status 现行 Issue Date 2012-09-03 Implementation 2013-03-01 Responsible Dept 国家标准委 Drafting Unit N/A