Home / Standards / GB/T 4797.2-2017 GB/T 4797.2-2017 Active Classification of environmental conditions—Environmental conditions appearing in nature—Air pressure 环境条件分类 自然环境条件 气压 Standard Type GBT ICS 19.020 CCS K04 Status 现行 Issue Date 2017-12-29 Implementation 2018-07-01 Responsible Dept 国家标准委 Drafting Unit N/A