GB/T 20159.4-2011
环境条件分类.环境条件分类与环境试验之间的关系及转换指南.无气候防护场所固定使用
Classification of environmental condition.Guidance for the correlation and transformation of environmental condition classes to the environmental tests.Stationary use at non-weatherprotected locations
GBT20159.4-2011, GB20159.4-2011