岩性油藏在地表可产生放射性氡异常，呈环状模式。
Lithologic reservoirs may form radioactive radon anomalies at surface, which generally assume the annular anomaly pattern.
运用电磁场理论详细分析了环状波导管内电磁场各分量方程、模式特征及其强度分布。
Equations of components, field properties and intensity distribution of the electromagnetic field of the annular waveguide are analyzed in detail with the theory of the electromagnetic field.
这个环状放射道路系统基本沿袭了前苏联的交通规划模式。
This system of ring and radial roads is basically copied from the Soviet model of transport planning.
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