Signal for lunch at the factory:
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Glass bottles on a conveyor line, room noise
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Heidelberian sorting printer
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Lowers forks, Forklift raises
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Forklift truck moving away
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Generator, jamming, start, work
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Lithographic press
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Grind metal on a grinding machine in a
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Power station turbine
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Steam pump
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Automatic folder
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Forklift approaching
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Box making machine
★★★★★