Bottling plant:
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Stitching machine
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Low frequency running engine
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Box making machine
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Stamping press
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Welding transformer operation under load
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Brewing unit, mill for grinding grain
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Factory work, general noise
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Factory atmosphere, drone in a mine tunnel
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Industrial exhaust fan
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Hydraulic down machine
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Hydraulic activator
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Noise in, Grind wood with a grinder
★★★★★