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Valves for nominal pressure at most PN 250. General specifications
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Optics and photonics. Diffractive optics. Terms and definitions
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Petroleum liquid fuels. Limited list and order of application
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Textiles. Quantitative chemical analysis. Part 8. Mixtures of acetate and triacetate fibres (method using acetone)
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Environmental protection. Surface water. Evaluation of the compliance of the composition and properties of water with the specified quality class
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