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0062 - Tianjin Taps Geothermal Energy. U.S. experts in geothermal energy, w...Back

Tianjin Taps Geothermal Energy. U.S. experts in geothermal energy, who attended the Sino-American geothermal technology seminar, visiting the Tianjin seismic station which use radon in subterranean hot water to provide seismic forecasts. Photo by Li Changyuan.

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Year 1981

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