“Robert Hallowell Richards”的概念、定义、翻译、参考文献-科学参考

单词	Robert Hallowell Richards
释义	Robert Hallowell Richards Encyclopedia 工学﹝矿冶人物﹞释 Robert Hallowell Richards里恰兹，R.H. （1844-08-26～1945-03-27）美国选矿工程专家，冶金学家和教育家。
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