The microstructures of Cu-Zn powder under different annealing conditions were studied. 研究了銅鋅粉末在不同退火工藝下的顯微組織變化。
In this paper the preparation method of surperpurity europium oxide by zinc powder reduction extraction chromatography is expouned. 簡述了採用鋅粉還原萃取色層法製取超高純氧化銪的工藝過程。
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