helicopter造句
181. Special shape fiber winding to screw propeller hub splint of helicopter was analyzed.
182. The single rotor helicopter with tail rotortype to become now the most common body - type helicopter.
183. The shipboard effect of helicopter has adverse effect on the flight safety.
184. The helicopter rotor blade deicing technique is greatly important to ensure the flight safe - ty.
185. A method is presented for unmanned helicopter flight dynamics model identification.
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