Air compressor, air blow:
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Book press
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General noise, Factory work
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Canning machine
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Welding transformer operation under load
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Loaders, Work in a warehouse, general noise
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Box making machine
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Factory atmosphere, drone in a mine tunnel
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Electric generator (hum)
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Turning on, Welding transformer, working,
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Circular knitting machine
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Room noise, Glass bottles on a conveyor line
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Breakdown press
★★★★★