苏联科学研究人员,最近成功地提炼了世界上最纯的铝,因为它的纯度达到了七个九字,即99.99999％,被称为七九铝。过去德国科学家提炼的铝,只能达到五个九字,其中还含有若干元素的杂质,现在苏联科学家所研究成功之七九铝,用光谱分析法来检验,发现其中只有 Soviet scientific researchers recently succeeded in refining the world’s purest aluminum because of its purity of seven or nine words, or 99.99999%, known as seventy-nine aluminum. In the past, the aluminum refined by German scientists could only reach five words, which contained impurities of several elements. At present, the success of the Soviet scientists, Seventy-nine aluminum, was tested by spectral analysis and found that only