Fastening, unfastening the seat belt in a helicopter:
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Helicopter engine malfunction signal
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Helicopter flies slowly
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Helicopter flies
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Helicopter approaching and hovering
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A helicopter approaches, lands and flies away
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The helicopter starts and flies away
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Helicopter whirls in place, flies away
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Helicopter Warning System
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Helicopter lands, shuts down
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Helicopter takes off
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Flies past several times, Helicopter whirls
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Helicopter shuts down
★★★★★