GSWA Byro potassium grid geodetic
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The radiometric, or gamma-ray spectrometric method, measures the natural variations in the gamma-rays detected near the Earth's surface as the result of the natural radioactive...
放射测量(radiometric)法,又称伽马射线能谱法,可测量地球表面附近探测到的伽马射线的自然变化,此类伽马射线由天然放射性活动产生……



