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在六十年代,工业国家的铜消费量(约450万吨)占整个资本主义世界铜消费量的95％左右,七十年代初为90％(约600万吨),到1980年消耗约640
In the 1960s, the copper consumption in industrialized countries (about 4.5 million tons) accounted for about 95% of the copper consumption in the capitalist world, 90% (about 6 million tons) in the early 1970s and about 640