For citations:
Isaev A.Е., Polikarpov A.M., Sil’vestrov S.V., Shcherblyuk N.G. The standard facility for the transmission the unit of sound pressure at ultrasonic frequencies. Izmeritel`naya Tekhnika. 2020;(6):61-65. (In Russ.) https://doi.org/10.32446/0368-1025it.2020-6-61-65
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