DIN 45635-14
DIN 45635-14
Noise Measurement on Machines; Airborne Noise Measurement, Enveloping Surface Method, Air-cooled Heat Exchangers (Air Coolers)standard by Deutsches Institut Fur Normung E.V. (German National Standard), 07/01/1980
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 07/01/1980