Electric industrial motor:
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Hydraulic down machine
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Low frequency running engine
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General noise, loaders, Work in a warehouse
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Grind metal on a grinding machine in a
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Mechanical lift
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Machine engine gaining momentum
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Lowers forks, Forklift raises
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Crusher
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Electric generator (hum)
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Forklift truck moving away
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Box making machine
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Steam pump
★★★★★