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Title Standard No. Implemented On
Pulse modulator tubes,Type TM-90(J)SJ 1620-19801981-1-1
Fundamental parameters and general requirements of audio frequency power amplifier(megaphone)GB 1982-19801981-1-1
Methods for indication of the 7-bit encoding character set for information processing switching on 12.7mm magnetic tapeGB/T 1989-19801980-12-1
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