Steam pump:
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Factory atmosphere, drone in a mine tunnel
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Noise in, Grind wood with a grinder
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Welding transformer operation under load
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Stop, work, Lathe turning on
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Electric generator (hum)
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Small centrifuge
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Dry cleaning
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Factory Atmosphere
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Electric industrial motor
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Hydraulic activator
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Power station turbine
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Air compressor, air blow
★★★★★