State system for ensuring the uniformity of measurements. State verification schedule for means measuring the airborne sound pressure in frequency range from 2 Hz to 100 kHz
Amplifying, rectifying and transmitting tubes of anode dissipated power to 25 W and vacuum display tubes for wide application designs. General specifications
State system for ensuring the uniformity of measurements. Parameters of ultrasonic fields. General requirements to measuring methods and characterization of fields in the frequency range 0,5 to 40 MHz
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