Low frequency running engine:
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Forklift truck moving away
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Noise in, Grind wood with a grinder
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Lithographic press
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Run, Compressor, start, shutdown
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Gas welding
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Print imprinted in cardboard, Notches
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Conveyor, conveyor belt
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Bottling plant
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Forklift drives by
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Stamping press
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Postal sorting line
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Loaders, Work in a warehouse, general noise
★★★★★