UNE 74020:1991

ACOUSTICS. STANDARD REFERENCE ZERO FOR THE CALIBRATION OF PURE TONE AIR CONDUCTION AUDIOMETERS.

NORM herausgegeben am 9.9.1991

The information about the standard:

Designation standards: UNE 74020:1991
Note: UNGÜLTIG
Publication date standards: 9.9.1991
The number of pages: 14
Approximate weight : 42 g (0.09 lbs)
Country: Spanish technical standard
Kategorie: Technische Normen UNE