Signal for lunch at the factory:
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Electric generator (hum)
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Hydraulic pump
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Automatic telephone switch
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Signal for lunch at the factory
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Hydraulic activator
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Working,, Welding transformer, turning on
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Bottling plant
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Newspaper press
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Fluid drilling, Brewing unit
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Off, standby, Forklift, on
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Grind wood with a grinder, noise in
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Conveyor, conveyor belt
★★★★★