鉱石不足が銅の価格決定に革命をもたらす
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MINING.com - Copper2026-11-12
The decades-old system that the copper industry uses to price mined ores is fracturing in the face of an acute shortage. Since at least the 1980s, a once-a-year negotiation between a leading mining company and a large copper smelter has set...
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