Russian standards PDF

United power system and isolated power systems. Relay protection and automation. Differential phase protection of power lines at voltage 110–220 kV. Testing

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Rough emeralds. Requirements for sorting and primary classification, sorting and certification

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Ship electrical assembly production. Terms and definitions

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Marine ships. International flange connection for the discharge of oily bilge water and oil residues. Dimensions and technical requirements

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Marine ships. International flange connection for discharge of sewage water. Dimensions and technical requirements

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Ski-poles for alpine and touring skiing. Requirements and test methods

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