维持水质量也是必要的到维持一个无刻度系统。
Maintaining water quality is also essential to maintaining a scale-free system.
以比较的方法，介绍了ISO CS系统无源刻度测量方法相对于传统环境样品放射性测量方法的优点。
This paper introduces the advantages of ISOCS measurement method by efficiency calibration without a radioactive source, comparing with traditional measurement methods of environment samples.
对高纯锗探测器无源效率刻度方法的特点、建立方式、方法验证做了介绍。
The efficiency calibration and measurement of coincidence factors of an HPGe detector;
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