Spectrograph:
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Hydraulic pump
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Mill for grinding grain, Brewing unit
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Factory atmosphere, drone in a mine tunnel
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Vibrosieve at the factory
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Box making machine
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Grind metal on a grinding machine in a
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Work, stop, Lathe turning on
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Conveyor belt, Conveyor
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Signal for lunch at the factory
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Factory Atmosphere
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Run, start, Compressor, shutdown
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Welding, Car factory, hammer knocking
★★★★★