?双旋翼式直升飞机
... twin jet airplane 双喷气策动机飞机 twin rotor helicopter 双旋翼式直升飞机 twin rudder 双舵 ...
双旋翼直升机
From the British base, a twin-rotor helicopter ferries U.S. Marines and equipment to Camp Dwyer, another British base that now is also home to the U.S. Marines 24th Expeditionary Unit.
NPR: Trip Illuminates Life on Bases Across Afghan Desert
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