As be known, it is the base work for sonar designer to study beam pattern, and also make very important actions in naval tactics.
声纳指向性研究是声纳设计的基础，同时也是影响声纳战术运用的重要环节。
As be known, it is the base work for sonar designer to study beam pattern, and also make very important actions in naval tactics.
声纳指向性研究是声纳设计的基础，同时也是影响声纳战术运用的重要环节。
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