搜索 - 科创

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出一些显微镜的配件，镜头，还有不知道干嘛用的奇怪的光学元件1，显微镜镜筒总成，见图，上面有4X，10X 40X 物镜， 12.5X的目镜，想办法固定好调好焦距，都能正常看，这个50元，不邮2

【说不定会更新】尽管更少的人知道，但事实上冰晶晕比彩虹常见得多。您甚至可以在一周内多次看到它们。如何观察冰晶晕，成为一个重要的问题。找到遮挡物大多数时候，冰晶晕是由太阳的强光形成的。但是太阳光十分刺眼...

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