... dark-line spectrum 暗线光谱 dark field line 暗场线 data of dark-line spectrum 暗线光谱数据 ...
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... 暗场聚光镜 dark field illumination 暗场像 dark field line 暗场线 dark field microscope ...
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·2,447,543篇论文数据，部分数据来源于NoteExpress
The specimen with different direction, with the field or a magnifying glass to see a group of parallel dark and straight line or a line or plane appears on the cleavage plane until it is twin.
将标本向不同方向旋转，直到用野外或放大镜看到晶面或解理面上出现一组平行的明暗相间的直线或折线，这就是双晶纹。
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