Home / Standards / GB/T 13269-1991 GB/T 13269-1991 Active Atmospheric air--Test dust standard sample--Fly ash 大气 试验粉尘标准样品 煤飞尘 Standard Type GBT ICS 13.060.20 CCS A67 Status 现行 Issue Date 1991-11-14 Implementation 1992-08-01 Responsible Dept 生态环境部 Drafting Unit N/A