一、前言电阻率单位的表示有多种形式,用“圆密耳”表示为其中之一。但是,在国内撰写出版或印发的有关资料中,用“圆密耳”表示的电阻率单位往往是错误的;并且,这类错误单位出现的次数多,涉及的文献广,持续的时间长,已在电阻材料和导电材料的研究、试制、生产、测量和使用中,不同程度地造成了混乱。另外,遵照国务院颁发的《关于在我国统一实行法定计量单位的命令》和国家计量局公 I. INTRODUCTION Resistivity units are expressed in many forms, one of which is represented by “round mils”. However, the unit of resistivity indicated by “circular mils” is often wrong in the relevant information compiled, published or distributed domestically. In addition, the number of such units of mistakes is numerous and the literature involved is long and the time lasted. Has been in the resistance of materials and conductive materials research, trial production, measurement and use, to varying degrees, caused confusion. In addition, in accordance with the “State Council issued on the uniform implementation of legal units of measurement in China” and the National Bureau of Metrology