Russian standards PDF
Fresnel lenses for motion-picture studio spotlights. Basic parameters, dimensions and measuring methods
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Solid fuel. Methods for determination of humic acids yield
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Single-operator single-phase transformers for manual arc welding. General technical requirements
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Acid-resistant and thermostable acid-resistant ceramic tiles. Specifications
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Glued laminated wood. Methods for determination of ultimate strength and modulus of elasticity in tension
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