Home / Standards / GB/T 4508-2010 GB/T 4508-2010 Abolished Standard test method for ductility of bitumen 沥青延度测定法 Standard Type GBT ICS 75.140 CCS E43 Status 废止 Issue Date 2011-01-10 Implementation 2011-05-01 Responsible Dept 国家标准委 Drafting Unit N/A