Gas welding:
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Rattling, The atmosphere of the factory
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Robotic assembly line
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Power station turbine
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Breakdown press
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Welding transformer operation under load
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Milling machine
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Forklift drives by
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Book press
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Print imprinted in cardboard, Notches
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Turn off, Air compressor turn on
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Newspaper press
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Work, Lathe turning on, stop
★★★★★