Generator, start, work, jamming:
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Conveyor, conveyor belt
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Electric generator (hum)
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Laser welding
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Compressor, start, run, shutdown
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Factory atmosphere, drone in a mine tunnel
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Steam pump
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Air compressor, air blow
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General noise, Work in a warehouse, loaders
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The atmosphere of the factory, rattling
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Notches, print imprinted in cardboard
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Hydraulic down machine
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Hydraulic activator
★★★★★