Automatic telephone switch:
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Steam pump
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Turn off, Air compressor turn on
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Power station turbine
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General noise, Work in a warehouse, loaders
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Conveyor, conveyor belt
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Car factory, hammer knocking, welding
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Hydraulic pump
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Automatic folder
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Mill for grinding grain, Brewing unit
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Off, Forklift, on, standby
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Compressor industry
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Machine engine gaining momentum
★★★★★