Home / Standards / GB/T 24761-2009 GB/T 24761-2009 Active Steel and granite straight edges 钢平尺和岩石平尺 Standard Type GBT ICS 17.040.30 CCS J42 Status 现行 Issue Date 2009-12-15 Implementation 2010-09-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A