Construction, cement loading, drum rotation:
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Start up, Bobcat loader, drive away
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Vibratory grinding machine
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Close the lid, open, Tool box
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Laying,, Road construction, skating rink
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Bulldozer rides through the woods, crackling
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Electric disc grinder
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Hammering a brick wall
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Electric polished marble
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Excavator Passes By
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Drill
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Excavator starts up, expects to be jammed
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Excavator digs a hole
★★★★★