To get a full understanding of the reaction thrust generated by water jet is the preliminary step that has to be taken before the designs of water jet cutting systems and jet propulsion systems.
认识并掌握水射流产生推进力的机理，是进行水射流切削系统和水射流推进系统设计的基础。
There's no reason why the compressor and turbine blades in a jet engine can't be driven by an electric motor to generate thrust under water, he says.
在为引擎装备了转子叶片和调速齿轮后，涡轮轴发动机单元可以在空中和水下为飞行器提供“可接受的工作效率”，他们称。
There's no reason why the compressor and turbine blades in a jet engine can't be driven by an electric motor to generate thrust under water, he says.
在为引擎装备了转子叶片和调速齿轮后，涡轮轴发动机单元可以在空中和水下为飞行器提供“可接受的工作效率”，他们称。
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