引言 818—C型定温电阻真空计已经生产10年了。尽管10年来国内曾出现过其它型式的电阻真空计,818—C型却是唯一坚持了生产的型号。这说明它在原理、设计方面是正确的,基本的工艺也是可行的。同时也说明在实现四个现代化过程中出现了日益增长的需求。因此,为了用户的方便,在技术 Introduction 818-C type RTD vacuum gauges have been produced for 10 years. Although other types of resistance vacuum gauges have appeared in China for the past 10 years, the Model 818-C is the only one that sticks to the production model. This shows that it is the principle, the design is correct, the basic process is feasible. At the same time, it shows that there has been an ever-increasing demand in the course of realizing the four modernizations. Therefore, for the convenience of users, the technology