This paper gives a comprehensive description of the WR-21 research and development history, engine performance as well as the design and maintenance features of its main components.
本文综述了该机的研制历程，发动机的性能，各主要部件的设计和维护特点。
This paper gives a comprehensive description of the WR-21 research and development history, engine performance as well as the design and maintenance features of its main components.
本文综述了该机的研制历程，发动机的性能，各主要部件的设计和维护特点。
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