Welding transformer operation under load:
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Electric industrial motor
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Lathe turning on, work, stop
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Grind wood with a grinder, noise in
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General noise, Factory work
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Steam pump
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Working machine engine
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Power station turbine
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Automatic telephone switch
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Gas welding
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Loaders, Work in a warehouse, general noise
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Working,, Welding transformer, turning on
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Hydraulic pump
★★★★★