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Unified system of design documentation. Graphical conventions in diagrams. Apparatus and telegraph repeaters

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Unified system for design documentation. Graphical designations in circuits. Light guide system equipment components

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Unified system for design documentation. Graphic designations. Pipeline elements

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Unified system for design documentation. Graphic designations in diagrams. Elements, devices and arrangements of gas chromatograph system

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Unified system for design documentation. Graphic designations. Drying apparatus

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