Electric generator (hum):
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Room noise, Glass bottles on a conveyor line
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Automatic folder
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Letter press
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Forklift raises, lowers forks
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Hydraulic activator
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Turning on, working,, Welding transformer
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Low frequency running engine
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Power station generator
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Power Plant Water Pumps
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Brewing unit, mill for grinding grain
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Grind metal on a grinding machine in a
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Rattling, The atmosphere of the factory
★★★★★