rare metal metallurgy
... 稀有金属矿物 mineral of rare metals; 稀有金属熔炼 rare metal metallurgy; 稀有金属温差电偶 rare-metal couple; ...
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真空自耗电弧炉是熔炼钛、锆等稀有金属的主要工业手段，如何提高熔炼工艺水平，保证产品质量，提高经济效益，已成为稀有金属行业广泛关注的问题。
With requred to the melting of rare metals the major issues are the development of melting technology, assurance of product quality, and increase in production efficiency.
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