Hydraulic machine up:
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Automatic telephone switch
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Stamping press
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Brewing unit, mill for grinding grain
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Spinning machine
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Steam pump
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Glass bottles on a conveyor line, room noise
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Circular knitting machine
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Grind wood with a grinder, noise in
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Oil pump
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Vibrosieve at the factory
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Notches, print imprinted in cardboard
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Turning on, working,, Welding transformer
★★★★★