geomagnetic surveyの例文

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1. His geomagnetic surveys showed that auroral activity was nearly uninterrupted.
2. They carried out a geomagnetic survey and excavated approximately
3. Geomagnetic surveys of the terrain reveal additional structures beneath the soil, as yet untouched by excavations.
4. Thiel was killed on 9 November 1961 whilst returning from a geomagnetic survey mission to Mirny Station.
5. It was not investigated again until 1874 when I . N . Smirnov conducted the first geomagnetic survey of European Russia.