Factory atmosphere, drone in a mine tunnel:
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Grind metal on a grinding machine in a
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Forklift truck moving away
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Forklift in motion
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Signal for lunch at the factory
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Hydraulic activator
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Steam pump
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Turning on, Welding transformer, working,
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Low frequency running engine
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Spectrograph
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Electric industrial motor
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Air compressor turn on, turn off
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Mill for grinding grain, Brewing unit
★★★★★