GB/T 4798.4-2023 Classification of environmental conditions—Classification of groups of environmental parameters and their severities—Part 4: Stationary use at non-weatherprotected locations (English Version)
2023GB/T 4798.4-2023 Classification of environmental conditions—Classification of groups of environmental parameters and their severities—Part 4: Stationary use at non-weatherprotected locations
2007GB/T 4798.4-2007 Environmental conditions existing in the application of electric and electronic products- Part 4: Stationary use at non-weather-protected locations
1990GB/T 4798.4-1990 Environmental conditions existing in the application for electric and electronic products--Stationary use at non-weather-protected locations