电子技术的发展及其在精密测量中的应用,使精密电测技术有了显著进展,如:电流比较仪和感应分压器的出现,新型电阻材料——埃弗诺姆和高绝缘聚四氟乙烯材料的应用,以及运算放大器的集成化等。美国标准局精密测量方法的发展也不例外,利用这种装置、材料和光电放大器,以及高灵敏检 The development of electronic technology and its application in precision measurement have made remarkable progress in the precision electrical measurement technology, such as the appearance of current comparator and inductive voltage divider, the new resistance material - Vinyl fluoride materials, as well as the integration of operational amplifiers. The development of the United States Bureau of Standards precision measurement method is no exception, the use of such devices, materials and optical amplifiers, as well as highly sensitive