📁 矿物勘探和开采
Businesses that explore for, or extract, mineral resources. Includes businesses that supply products and services in support of these activities in the fields of geology, geophysics, mining , and other earth sciences.
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Frontline: Dr. Glenn Seaborg
http://www.pbs.org/wgbh/pages/frontline/shows/reaction/interviews/seaborg.html