Automatic telephone switch:
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Hammer knocking, welding, Car factory
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Laser welding
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Vibrosieve at the factory
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Stitching machine
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Spectrograph
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Compressor industry
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Stop, Lathe turning on, work
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Lowers forks, Forklift raises
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Turn off, Air compressor turn on
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Turning on, working,, Welding transformer
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Circular knitting machine
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Factory Atmosphere
★★★★★