English中文
cross section of a refracting telescope /ˈkɔːdləs ˈdɹɪldɹˈaɪvə/ n

中文：折射望远镜剖面图

中文 · 折射望远镜剖面图
Meaning：Magnification depends on the length of the main tube and the size and composition of the lens system.
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Refracting telescope cutaway

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