Electric surface grinding machine:
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Knocking a hammer indoors with an echo
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Bobcat Loader Starts Up, Waits
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Jamming, Bobcat loader approaching
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Concrete mixer
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Wood file
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Manual grinder
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Woodworking
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Cutting machine
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Electric polished marble
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Vibratory grinding machine
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Driving piles, Construction of buildings
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Shuts down, Bobcat loader starts up, waits
★★★★★