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Acoustics. Attenuation of sound during propagation outdoors. Part 1. Calculation of the absorption of sound by the atmosphere
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Gas cylinders, with a capacity of up to 500 liters and an working pressure of up to 40 MPa, with aluminum liner, reinforced with coating of polymer composites. General specifications
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Household and similar electrical appliances. Safety. Part 2-72. Particular requirements for floor treatment machines with or without traction drive, for commercial use
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Wood products for tropical regions. Protection means and protective parameters
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