NEN 10721-3-7-1994 Classification of environmental conditions.Part 3:Classification of groups of environmental parameters and their severities.Section 7:Portable and non-stationary use(IEC 721-3-7:1987+A1:1991)
1994NEN 10721-3-7-1994 Classification of environmental conditions.Part 3:Classification of groups of environmental parameters and their severities.Section 7:Portable and non-stationary use(IEC 721-3-7:1987+A1:1991)