directional detector 方向探测器
non-directional detector 非定向探测器 ; 非定向性探测器
directional sound detector 声响测向仪
sound directional detector 声响测向仪
bi directional detector 双向探测器
directional radiation detector [核] 方向辐射探测器
directional U detector 方向探测器
directional E detector 方向探测器
X-ray directional flaw detector 定向X射线探伤仪
The work principle of directional detector and the key technique for identifying target bearing are analyzed. Design and calculation of detecting antenna have been carried out.
分析了定向探测器的工作原理和目标方位识别的关键技术，并对探测天线的设计做了详细的分析和计算。
The work principle of directional detector and the key technique for identifying target bearing are analyzed.
分析了定向探测器的工作原理和目标方位识别的关键技术，并对探测天线的设计做了详细的分析和计算。
Radiation Angle and central deviation is important parameters of an X-ray directional flaw detector.
辐射角及中心偏移，是定向X射线探伤仪的重要技术指标。
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