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Geometrical optics. Terms, definitions and letter symbols
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Materials for metal covering cassettes in the constructions of washed fasade systems. General technical requirements
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United power system and isolated power systems. Relay protection and automation. Distance protection of power transmission lines at voltage class 110 kV and higher powered from two or more sides. The method of calculation and selection of settings
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Services in railway transport. Transportation of perishable goods. General quality requirements
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