Low frequency running engine:
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Drone in a mine tunnel, Factory atmosphere
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Loaders, Work in a warehouse, general noise
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Conveyor belt, Conveyor
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Electric industrial motor
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Canning machine
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Bottling plant
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Spectrograph
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Heidelberian sorting printer
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Compressor, shutdown, start, run
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Generator, jamming, work, start
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Lithographic press
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Automatic folder
★★★★★