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据塔斯社伦敦3月23日电和希尔森·莱曼/赫顿公司的资料,1987—1991年资本主义世界各国金精矿的产量如下(吨):
According to the TASS agency London, March 23rd, and the Heathon Lyman / Hutton Company, the output of gold concentrates in capitalist countries of the world in 1987-1991 is as follows (tons):