Industrial exhaust fan:
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Factory Atmosphere
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Hydraulic machine up
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Working machine engine
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Run, Compressor, shutdown, start
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Electric generator (hum)
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Work in a warehouse, loaders, general noise
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Air compressor turn on, turn off
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Mechanical lift
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Power station turbine
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Factory atmosphere, drone in a mine tunnel
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Stop, work, Lathe turning on
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Hydraulic down machine
★★★★★