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BS EN 61220:1995

Заменен
Ultrasonics. Fields. Guidance for the measurement and characterization of ultrasonic fields generated by medical ultrasonic equipment using hydrophones in the frequency range 0.5 MHz to 15 MHz — 26 стр.
ICS
17.140.50 Electroacoustics. Including sound level meters / Электроакустика. Включая слуховые аппараты и шумомеры