Automatic telephone switch:
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Work in a warehouse, general noise, loaders
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Air compressor, air blow
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Turn off, Air compressor turn on
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Machine engine gaining momentum
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Postal sorting line
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Spectrograph
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Start, shutdown, run, Compressor
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Milling machine
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Notches, print imprinted in cardboard
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Spinning machine
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Rattling, The atmosphere of the factory
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Room noise, Glass bottles on a conveyor line
★★★★★