jìng tǒng
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Chinese dictionary
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  • n.(of a microscope) body tube; lens cone

    • zhè shì wèi yú jìng tǒng dǐ bù de yī kuài pāo wù miàn jìng

      位于镜筒底部抛物面镜

      This is the paraboloidal mirror at the bottom of the tube.