Postal sorting line:
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Forklift in motion
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Rattling, The atmosphere of the factory
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Spinning machine
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Industrial exhaust fan
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Automatic folder
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Hydraulic machine up
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Forklift approaching
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Low frequency running engine
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Working machine engine
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Air blow, Air compressor
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Working,, turning on, Welding transformer
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Vibrosieve at the factory
★★★★★