Russian standards

Unified system for design documentation. Rules for presentation of electric diagrams of railway signalling centralization and blocking

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Unified system for design documentation. Graphic identifications in schemes. Switchgear devices

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Unified system for design documentation. Graphic designations in diagrams. The receiving part of electromechanical devices

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Unified system for design documentation. Graphical designations on electrical diagrams. Devices of pulse-code modulation

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Unified system for design documentation. Graphic designations in electric diagrams. Integral optoelectronic elements of indication

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Unified system of design documentation. Graphic symbols for use in electric schemes, systems of information transmission with temporal division of channels

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