Home / Standards / GB/T 6012-1999 GB/T 6012-1999 Abolished Butadiene for industrial use--Testing of appearance 工业用丁二烯外观试验 Standard Type GBT ICS 71.080.10 CCS G15 Status 废止 Issue Date 1999-08-10 Implementation 2000-06-01 Responsible Dept 中国石油和化学工业联合会 Drafting Unit N/A