Russian standards PDF
Data transmission signals entering in the communication channels. Energetic parameters
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Integrated digital communication network. Switching and digital transmission systems interface specification
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Pressure thermoplastic pipes and their fittings for water supply and heating systems. General specifications
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Grounding of stationary telegraph and telephone installations, wire-broadcasting distribution points, radio-relay stations and
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Line communication sets. Protection circuits from dangerous voltages and currents arisen at lines. Specifications
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Thermoplastic pipes. Universal wall thickness table
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