Hydraulic machine up:
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Stop, work, Lathe turning on
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Factory Atmosphere
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Circular knitting machine
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Signal for lunch at the factory
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Power Plant Water Pumps
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Newspaper press
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Industrial exhaust fan
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Air compressor, air blow
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Rattling, The atmosphere of the factory
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Compressor, run, shutdown, start
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Oil pump
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Electric industrial motor
★★★★★