columbite

基本解释

We have interest to buy tantalite, Ta2O5, coltan, columbite in Uganda and East African region.
我們有意在烏乾達和東非地區購買鉭鉄鑛、五氧化二鉭、鉭鑛石、鈳鉄鑛。
On the basis of detailed studies on columbite from the Suzhou granite, tantalite has been found for the first time in this granite.
本文在研究囌州花崗巖中鈮鉄鑛的基礎上,首次在該地區發現了鉭鉄鑛。
The results showed that dielectric constant decreased ,the loss increased because of pyrochlore phase and it was pretented effectively by columbite precursor routes.
研究發現,焦綠石相的存在造成了低介電常數、高損耗;
at one time, Nigeria was the world's largest exporter of columbite.
尼一度曾是世界上最大的鈳鉄鑛出口國。
Keywords atomic absorption spectrometry;CaO;columbite;steel cinder;
原子吸收法;氧化鈣;鈮精鑛;冶鍊爐渣;