Truck unloads stone into the crushing machine, crushing process:
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Fire truck starts, expects to shut down
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Truck waiting from a distance, approaching,
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The truck drives by slowly
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Waiting, The truck is approaching, jamming
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The truck starts up, drives off to the side,
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Expects diesel engine to, Truck approaches
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Garbage truck loads trash
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Riding a bulldozer
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A truck passing by, Garbage truck
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Riding in a truck, stopping, waiting
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Truck honking, unloading cargo, approaching
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Fire engine compartment door open, close
★★★★★