Home / Standards / GB/T 12971.2-2008 GB/T 12971.2-2008 Abolished Trolley and contact wires for electric traction - Part 2: Aluminium and steel composite trolley and contact wires 电力牵引用接触线 第2部分: 钢、铝复合接触线 Standard Type GBT ICS 29.060.10 CCS K11 Status 废止 Issue Date 2008-06-30 Implementation 2009-04-01 Responsible Dept 中国电器工业协会 Drafting Unit N/A