加马射线常数比
specific gamma-ray constant
特征伽马射线常数
specific gamma ray constant
常规X射线层析成象
conventional X-ray tomography
常规切线照射
conventional tangential irradiation
地震射线方向异常
seismic ray direction anomaly
非常光线舟射率
principal index for extraordinary ray
异常折射线
extraordinary refracted ray