Home / Standards / GB/T 26944.3-2011 GB/T 26944.3-2011 Active Tunnel environment detection equipment - Part 3: Visibility indicator 隧道环境检测设备 第3部分：能见度检测器 Standard Type GBT ICS 93.080.30;03.220.20 CCS R80 Status 现行 Issue Date 2011-07-19 Implementation 2012-05-01 Responsible Dept 国家标准委 Drafting Unit N/A