Industrial exhaust fan:
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Automatic telephone switch
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Gas welding
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Drone in a mine tunnel, Factory atmosphere
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Off, standby, on, Forklift
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Notches, print imprinted in cardboard
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Circular knitting machine
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Car factory, hammer knocking, welding
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Electric generator (hum)
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Working machine engine
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Compressor industry
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Printing press
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Glass bottles on a conveyor line, room noise
★★★★★