Automatic telephone switch:
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Work, stop, Lathe turning on
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Generator, work, jamming, start
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Box making machine
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Heidelberian sorting printer
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Working machine engine
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Conveyor belt, Conveyor
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Breakdown press
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Hydraulic activator
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Rattling, The atmosphere of the factory
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Grind metal on a grinding machine in a
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Air blow, Air compressor
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Forklift, on, off, standby
★★★★★