Forklift, on, standby, off:
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Heidelberian sorting printer
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Letter press
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Spinning machine
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Grind metal on a grinding machine in a
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Hammer knocking, welding, Car factory
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Compressor, start, shutdown, run
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Welding transformer operation under load
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Signal for lunch at the factory
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Oil pump
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Postal sorting line
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Standby, Forklift, off, on
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Small centrifuge
★★★★★