Faced with a challenge from Mr Simon, Mr Ehrlich selected five metals-copper, chromium, nickel, tin and tungsten-whose prices he thought would rise in real terms over the following ten years.
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文章回顾了最近一年多来实施钨品行业价格自律的过程和取得的实效。
Review this year's work on the standardization of tungsten price and the actual work effects in more than one year.