Home / Standards / GB/T 12085.20-2011 GB/T 12085.20-2011 Abolished Optics and optical instruments - Environmental test methods - Part 20: Humid atmosphere containing sulfur dioxide or hydrogen sulfide 光学和光学仪器 环境试验方法 第20部分：含二氧化硫、硫化氢的湿空气 Standard Type GBT ICS 37.020 CCS N30 Status 废止 Issue Date 2011-06-16 Implementation 2011-11-01 Responsible Dept 中国机械工业联合会 Drafting Unit 中国机械工业联合会