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European countries with a history of Soviet occupation have a disproportionately high contribution to historical world production relative to the stated size of their current reserves, especially Germany. Did they have any economically feasible reserves during their period of occupation, or did the Soviets force them to produce from low grade/uneconomical deposits to help boost output to meet their own demand?

Also, did Germany use any of the material produced in mines in Czechoslovakia for its own nuclear program during World War II? Apparently Czechoslovakia was something like the Baku of uranium mining, developing the technology and techniques and serving as a major early production site.
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