passive gamma ray assay
... passivation 钝化 passive gamma ray assay 固有射线分析 passive gamma ray spectroscopy 固有射线能谱法 ...
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本文介绍了该系统的X射线成像原理、光路分析以及标尺和参考球的使用，并对标尺的固有误差作了分析。
The X-ray image principle and the mark ruler and standard sphere are introduced in this paper. The error from the mark ruler is also analyzed in the paper.
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