Diesel engine:
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Knocking a hammer indoors with an echo
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Concrete processing, Construction
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A circular saw
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Manual grinder
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Drill machine
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Expects to be jammed, Bulldozer starts
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The sounds of the, Knocking hammer indoors
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Hammer and chisel, blows on concrete
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Excavator starts up, expects to be jammed
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Grinder
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Grinder tool and pipe
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Screwdriver
★★★★★