Stitching machine:
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Book press
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Stamping press
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Electric generator (hum)
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Electric welding
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Air blow, Air compressor
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Hydraulic machine up
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Electric industrial motor
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Power Plant Water Pumps
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Compressor, shutdown, start, run
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Drone in a mine tunnel, Factory atmosphere
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Work, Generator, jamming, start
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Signal for lunch at the factory
★★★★★