Working machine engine:
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Bottling plant
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Heidelberian sorting printer
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Forklift, standby, off, on
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Conveyor, conveyor belt
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Grind metal on a grinding machine in a
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Signal for lunch at the factory
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Electric generator (hum)
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Circular knitting machine
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Factory work, general noise
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Industrial exhaust fan
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Brewing unit, mill for grinding grain
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Lithographic press
★★★★★