UNE-EN 60721-3-7:1997 CLASSIFICATION OF ENVIRONMENTAL CONDITIONS. PART 3: CLASSIFICATION OF GROUPS OF ENVIRONMENTAL PARAMETER AND THEIR SEVERITIES. SECTION 7: PORTABLE AND NON-STATIONARY USE.
1998UNE-EN 60721-3-7/A1:1998 CLASSIFICATION OF ENVIRONMENTAL CONDITIONS. PART 3: CLASSIFICATION OF GROUPS OF ENVIRONMENTAL PARAMETERS AND THEIR SEVERITIES. SECTION 7: POTABLE AND NON-STATIONARY USE.
1997UNE-EN 60721-3-7:1997 CLASSIFICATION OF ENVIRONMENTAL CONDITIONS. PART 3: CLASSIFICATION OF GROUPS OF ENVIRONMENTAL PARAMETER AND THEIR SEVERITIES. SECTION 7: PORTABLE AND NON-STATIONARY USE.