Knocking hammer indoors, the sounds of the environment outside the window:
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Close the lock, Tool box, open
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End of pouring, Construction, cement loading
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Truck crane works
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Concrete mixer
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Hammer and chisel, wood blows
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Electric polished marble
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Construction of buildings, driving piles,
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Diesel engine
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Electric tile cutter
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Bulldozer approaching, jamming
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Dip the roller in the paint tray with paint
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Screwdriver screwing a screw into a tree
★★★★★