市场上可用的时间频率测量设备和标准的更深入的讨论，以及此类仪器如何应用在计量实验室。
A more in-depth discussion of commercially available time and frequency measurement equipment and standards, and how such instrumentation can be used in the metrology laboratory.
介绍了两项关于医学实验室的国际标准、三项关于医学实验室的国家标准，对我国医学计量检测工作提出了建议。
Two ISO standards and three GB standards of medical Lab are introduced. It is suggested that the work of medical measurement and test of our country.
更深入地讨论电阻标准和阻抗标准，及如何在计量实验室实现、表达和比较这些标准。
A more in-depth discussion of resistance and impedance standards, and how such standards are realized, represented and compared in metrology laboratories.
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