Power station turbine:
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Work, stop, Lathe turning on
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Drone in a mine tunnel, Factory atmosphere
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Loaders, general noise, Work in a warehouse
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Rattling, The atmosphere of the factory
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Robotic assembly line
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Welding, hammer knocking, Car factory
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Spectrograph
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Book press
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Electric generator (hum)
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Milling machine
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Dry cleaning
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Welding transformer, turning on, working,
★★★★★