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Acoustics. Determination of sound power levels and sound energy levels of noise sources using sound pressure. Precision methods for anechoic rooms and hemi-anechoic rooms
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Unified system for design documentation. Electronic design documentation. Requirements to 3D geometrical model formats
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Lining artificial leather. Method for determination of resistance to rubbing
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Steel tubes. Preparation of ends of tubes and fittings for welding. General technical requirements
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Solid carbide twist drills. Middle series. Basic dimensions
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