Signal for lunch at the factory:
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Fluid drilling, Brewing unit
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Electric industrial motor
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Book press
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Standby, on, off, Forklift
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Lithographic press
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Signal for lunch at the factory
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Grind metal on a grinding machine in a
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Air compressor, air blow
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Mill for grinding grain, Brewing unit
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Robotic assembly line
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Automatic telephone switch
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Low frequency running engine
★★★★★