Acoustics. Hearing protectors. Part 4: Measurement of effective sound pressure levels for level-dependent sound-restoration ear-muffs
NORM herausgegeben am 1.3.2002
Designation standards: STN EN ISO 4869-4
Classification mark: 832131
Catalog number: 85464
Note: UNGÜLTIG
Publication date standards: 1.3.2002
The number of pages: 16
Approximate weight : 48 g (0.11 lbs)
Country: Slovak technical standard
Kategorie: Technische Normen STN