Home / Standards / GB/T 20475.3-2012 GB/T 20475.3-2012 Active Classification for content of harmful elements in coal - Part 3:Arsenic 煤中有害元素含量分级 第3部分:砷 Standard Type GBT ICS 73.040 CCS D20 Status 现行 Issue Date 2012-12-31 Implementation 2013-10-01 Responsible Dept 中国煤炭工业协会 Drafting Unit N/A