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International Standard Category: Noise emitted by machines and equipment

GB/T 6446-1986    Frequency weighting for the measurement of aircraft noise (D-weighting)
飞机噪声测量用频率计权(D-计权) ;
Category No.:17.140.20 Valid Status:abolished
Issued Organization:National Bureau of Standards Issued Date:1986-05-28
Implemented Date:1987-5-1 Abolished Date:2005-10-14
Superseded Standard.: Superseded Date:
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