Home / Standards / GB/T 15335-2019 GB/T 15335-2019 Active Determination of leakage rate and specific resistance for air duct 风筒漏风率和风阻的测定方法 Standard Type GBT ICS 73.100.99 CCS D90 Status 现行 Issue Date 2019-06-04 Implementation 2020-01-01 Responsible Dept 中国煤炭工业协会 Drafting Unit N/A