... isotropic directivity 全方向性 isotropic gain of antenna 天线的各向同性增益 J antenna J形天线 ...
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For horizontally isotropic soil layers, resistivity changes due to stress variation exhibit directivity, that is, the changes measured along different profiles are not identical.
水平各向同性土层,在应力作用下,不同方向电阻率变化不同,呈现出方向性。
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