Circular knitting machine:
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Factory work, general noise
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Lowers forks, Forklift raises
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Electric industrial motor
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Factory atmosphere, drone in a mine tunnel
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Vibrosieve at the factory
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Gas welding
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Electric generator (hum)
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Start, run, Compressor, shutdown
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Low frequency running engine
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Dry cleaning
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Power Plant Water Pumps
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Forklift drives by
★★★★★