Unverified50% confidenceFactExact time
The United States Strategic Mineral Stockpile system (National Defense Stockpile) was established in 1939 under the Strategic and Critical Materials Stock Piling Act.
1
Sources
50%
Confidence
Long-term
Relevance
8/9/2026
First Seen
Sources
关键矿产开采如何预示战争：钨矿重启背后的地缘博弈
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