The atmosphere of the factory, rattling metal objects:
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Noise in, Grind wood with a grinder
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Spinning machine
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Welding transformer operation under load
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Drone in a mine tunnel, Factory atmosphere
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Air compressor, air blow
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Factory Atmosphere
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Electric generator (hum)
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Dry cleaning
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Stamping press
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Book press
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Lathe turning on, work, stop
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Machine engine gaining momentum
★★★★★