A heated tungsten filament from the electron gun generates electrons that get focus on the specimen from the condenser lenses.This entry was posted in In k? thu?t s?. Bookmark the permalink. VI?T AD VI?T AD là công ty in k? thu?t s? hàng ??u t?i HN. B?ng n?ng l?c ?ã ph?c v? cho h?n one hundred.With the instrumentation described, the working mec… Read More