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IEC 60500:1974 ed1.0

Заменен
IEC standard hydrophone — 12 стр.
Gives requirements and characteristics to specify a hydrophone which is suitable as an IEC Standard Hydrophone for calibration purposes, to be used as a laboratory standard for comparison with other hydrophones intended for daily use.
ICS
17.140.50 Electroacoustics. Including sound level meters / Электроакустика. Включая слуховые аппараты и шумомеры