Glass bottles on a conveyor line, room noise:
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Forklift truck moving away
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Automatic folder
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Electric welding
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Noise in, Grind wood with a grinder
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Milling machine
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Low frequency running engine
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Work, stop, Lathe turning on
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Box making machine
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Jamming, start, Generator, work
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Working,, turning on, Welding transformer
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Industrial exhaust fan
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Electric industrial motor
★★★★★