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DIN EN ISO 389-1:2017-03

Отменен
Acoustics - Reference zero for the calibration of audiometric equipment - Part 1: Reference equivalent treshold sound pressure levels for pure tones and supra-aural earphones (ISO/DIS 389-1:2016); German version prEN ISO 389-1:2016
DIN EN ISO 389-1:2017-03
Отменен