State system for ensuring the uniformity of measurements Q-0272-2 second order of accuracy quality factor standard measures. Methods and means of verification
Signalling on low-voltage electrical installations in the frequency range 3 kHz to 148,5 kHz. Part 2-2. Immunity requirements for mains communications equipment and systems operating in the range of frequencies 95 kHz to 148,5 kHz and intended for use in industrial environments
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