double diffraction method
双异质结构半导体激光器：double heterostructure semiconductor laser 双衍射法：double diffraction method 双谐波聚束器：double harmonic buncher ..
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X射线双晶回摆衍射法 X-ray double crystal rocking diffraction
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前言： 对用电子显微镜测量薄膜厚度的三种方法：双束衍射法、污斑法、污线法进行了实验及比较分析。
The experiments , comparison and analysis for the three thickness measurement methods :two-beam diffraction method , contamination spot method and contamination line method were carried out.
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