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由于生产硬质合金用钴的主要供应国扎伊尔出现不稳政局,自1991年秋季以来钴价上涨逾100%。这意味着硬质合金和硬质合金刀具
Due to the precarious political situation in Zaire, the main supplier of cobalt for the production of cemented carbides, the price of cobalt has risen by more than 100% since the autumn of 1991. This means cemented carbide and carbide tools