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In addition, the USAF continues to fund development work of the Aerojet (formerly Atlantic Research) Variable Flow Ducted Rocket ramjet system as a future propulsion option for an extended range AAM.

此外,美继续投资于航喷气研究所(原来的大西研究所)的可变喷流管火箭发动机系统,将增程导弹的未来推进选项。

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经济学人-科技

The objective is to develop fuel for ramjets, a type of engine that operates efficiently only above Mach 3.

目的是为冲气发动机(效率仅高于3马赫)开发料。

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奇趣工程百科

Remember, it's a ramjet that needs air to gain speed.

请记住,它是冲气发动机,需要空气来获得速度。

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奇趣工程百科

The ramjet being able to take off and land on its own.

发动机能够自行起飞和降落。

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