奶奶的遺產全都都留在...
Scanning electron microscope - Wikipedia, the free encyclopedia 原來奶奶平常都在忙這個啊… 這奶奶太前衛了...A scanning electron microscope (SEM) is a type of electron microscope that produces images of a sample by scanning it with a focused beam of electrons. The electrons interact with atoms in the sample, producing various signals that can be detected and tha...
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