The network technology, which is still immature among the key technologies of S WR, is also becoming a research hotspot.
而作为软件无线电关键技术之一且仍未被突破的网络技术也正处于研究的热点范畴。
How to define and estimate water resources (WR) remains a problem appealing to hydraulic professionals in China.
水资源量的概念及其计算一直是国内外水利界所关注的问题。
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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