Hydraulic machine up:
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Factory atmosphere, drone in a mine tunnel
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Low frequency running engine
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Start, jamming, Generator, work
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Vibrosieve at the factory
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Compressor, start, run, shutdown
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Gas welding
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Spectrograph
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Automatic telephone switch
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Work, Lathe turning on, stop
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The atmosphere of the factory, rattling
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Steam pump
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Power Plant Water Pumps
★★★★★