Industrial exhaust fan:
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Spinning machine
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Letter press
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Mill for grinding grain, Brewing unit
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Car factory
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Notches, print imprinted in cardboard
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Air compressor turn on, turn off
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Generator, work, jamming, start
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Stitching machine
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Glass bottles on a conveyor line, room noise
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Signal for lunch at the factory
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Low frequency running engine
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Hydraulic machine up
★★★★★