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n. �ƽ����ƽ���

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n. actuation

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1. This aircraft works by jet propulsion.
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2. What about new propulsion system technology?
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3. To fly without propulsion. Used of an aircraft.
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n.
  1. a propelling force
  2. the act of propelling

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propulsion
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propulsion system
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propulsion nozzle
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nuclear propulsion
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propulsion equipment
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