Welding transformer operation under load:
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Noise in, Grind wood with a grinder
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Oil pump
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General noise, Work in a warehouse, loaders
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Rattling, The atmosphere of the factory
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Electric generator (hum)
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Crusher
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Factory work, general noise
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Canning machine
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Factory atmosphere, drone in a mine tunnel
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Welding transformer operation under load
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Power station turbine
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Industrial exhaust fan
★★★★★