State system for ensuring the uniformity of measurements. Convex spherical mirrors. Measurement technique of curvature radius and local departures of surfaces forms from sphericity by holographic shear interferometry
Roofing and hydraulic-insulating flexible bitumen-based materials and polymeric (thermoplastic or elastomer) materials. Method of artificial thermal ageing
Yttrium and its oxides. Method of determination of such impurities as oxides of praseodymium, neodymium, samarium, europium, terbium, dysprosium, holmium, erbium, thulium and ytterbium
€10
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