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State systems for ensuring the uniformity of measurements. Method of measurement of spectral diffuse reflectance of photovoltaic elements and solar collectors at angles of incidence of the radiation from 5 ° to 85 °
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Washers for tube connections on internal cone. Construction and dimensions
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Yarn from bast fibres and their blend with chemical fibres. Specifications
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Combined alternative driven broaches for 6 slitting holes with straightside profile and centering at internal diameter. Design and dimensions
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Moulding sands and sand mixtures. Method for determination of clayey component
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