Low power scanning electron microscope image of tooth surface, computer-coloured yellow on blue background.

牙齿表面的电子显微镜扫描图。

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Electronic transmitting element, electron source, image display device and manufacture method thereof.

电子发射元件，电子源，图象显示装置及制造方法。

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Electronic transmitting element, electron source, image display device and manufacture method thereof.

电子发射元件，电子源，图象显示装置及制造方法。

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