Notches, print imprinted in cardboard:
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Crusher
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Factory atmosphere, drone in a mine tunnel
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Air compressor, air blow
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Automatic telephone switch
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Air compressor turn on, turn off
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Printing press
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Car factory
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Machine engine gaining momentum
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Heidelberian sorting printer
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Welding transformer operation under load
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Working machine engine
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Dry cleaning
★★★★★
