Electric welding:
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Room noise, Glass bottles on a conveyor line
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Automatic telephone switch
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Electric generator (hum)
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Vibrosieve at the factory
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Gas welding
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Drone in a mine tunnel, Factory atmosphere
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Grind metal on a grinding machine in a
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Working machine engine
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Car factory
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Dry cleaning
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Signal for lunch at the factory
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Power station turbine
★★★★★