The text introduces the theory of the radar antenna 's scan wave by adopting the method of using wave width to describe antenna radiate direction FIG.
本文介绍了雷达天线的扫描波束理论，采用了用波束宽度描述天线辐射方向图的方法。
2
This paper analyzes the importance of transverse wave testing. It briefly introduces the method and technique of swave testing by using seismograph in underground coyote.
本文分析了横波测试的重要性，简要介绍了用地震仪在地下硐室测试S波的方法与技术。
3
An S-wave arrival time detection method for wave velocity measurement in single-hole method is presented in this paper.