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Social and household adaptation of the visually impaired persons. Spatial orientation and mobility
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Textiles. Quantitative chemical analysis. Part 6. Mixtures of viscose, certain types of cupro, modal or lyocell with certain other fibres (method using formic acid and zinc chloride)
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Shell counterbore arbors with removable guides. Design and dimensions
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Unified system of corrosion and ageing protection. Metal and non-metal inorganic coatings. Procedures for accelerated corrosion tests
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