Milling machine:
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Work, start, jamming, Generator
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Forklift approaching
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Stamping press
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Hydraulic activator
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Book press
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Noise in, Grind wood with a grinder
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Robotic assembly line
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Electric generator (hum)
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Factory atmosphere, drone in a mine tunnel
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Newspaper press
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Grind metal on a grinding machine in a
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Low frequency running engine
★★★★★