Home / Standards / GB/T 34199-2017 GB/T 34199-2017 Active Hot-rolled H section steel for electrified railway pillars 电气化铁路接触网支柱用热轧H型钢 Standard Type GBT ICS 77.140.70 CCS H44 Status 现行 Issue Date 2017-09-07 Implementation 2018-06-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A