Factory atmosphere, drone in a mine tunnel:
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Air compressor turn on, turn off
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Electric industrial motor
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Standby, off, Forklift, on
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Machine engine gaining momentum
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Drone in a mine tunnel, Factory atmosphere
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Brewing unit, fluid drilling
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Automatic telephone switch
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Working,, Welding transformer, turning on
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Power station generator
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Forklift in motion
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Dry cleaning
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Forklift drives by
★★★★★