GOST R IEC 61161-2019 State system for ensuring the uniformity of measurements. Ultrasonic power in liquids. General requirements to measuring by method of radiation force balance
1970GOST R IEC 61161-2019 State system for ensuring the uniformity of measurements. Ultrasonic power in liquids. General requirements to measuring by method of radiation force balance
2009GOST R IEC 61161-2009 State system for ensuring the uniformity of measurements. Ultrasonic power in liquids. General requirements to measuring methods in the frequency range 0,5 to 25 MHz