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State system for ensuring the uniformity of measurements. Optical density of photomaterials. Method of measurement
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Toys. General safety requirements and methods of tests. Graphical symbol for age warning labelling
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Brown coals, hard coals and anthracites. Classification according to genetic and technological parameters
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United power system and isolated power systems. Hydraulic power stations. Hydraulic engineering structures. Instrumentation and measuring systems and devices. Terms of creation. Standards and norms
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