subsurface investigation meaning in English

地下探查
地质勘探

Standard guide for using the gravity method for subsurface investigation
重力法探测地下的标准指南
Standard guide for using the seismic refraction method for subsurface investigation
地下勘探用震波折射法的标准导则
Standard guide for use of the metal detection method for subsurface investigation
地下勘察用金属探测法的使用的标准指南
Standard guide for using the direct current resistivity method for subsurface investigation
直流电阻率法探测地下的标准指南
Standard guide for using the seismic - reflection method for shallow subsurface investigation
用地震反射法的浅地下勘测的标准指南

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