随着科学技术的飞跃发展,有必要对长度基本单位——米所下的定义,要求得更加严密一些。现在是处于微米技术时代,例如大规模集成电路和粉体超微粒子等微米加工技术在不断发展,计测技术也有了飞跃提高,因而超微米技术领域往往与尖端技术有关联,米的定义的准确性很可能影响到产品的精度。最近在粉体方面,关于如何生产超微粒 With the rapid development of science and technology, it is necessary to have a more strict definition of the basic unit of length - meters. Micron technology is now in the era of micro-technology such as large-scale integrated circuits and ultra-fine powder particles such as micro-processing technology continues to grow, measurement techniques have also been leaps and bounds, and thus the field of ultra-micron technology is often associated with cutting-edge technology, the definition of rice accuracy Sex is likely to affect the accuracy of the product. Recently in powder, on how to produce ultrafine particles