Gas welding:
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Letter press
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Work, stop, Lathe turning on
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Electric generator (hum)
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Drone in a mine tunnel, Factory atmosphere
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Fluid drilling, Brewing unit
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Welding, Car factory, hammer knocking
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Jamming, Generator, start, work
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Newspaper press
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Vibrosieve at the factory
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Automatic telephone switch
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Brewing unit, mill for grinding grain
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Hydraulic activator
★★★★★