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This is the paraboloidal mirror at the bottom of the tube.
是位于镜筒底部的一块抛物面镜.
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According to this omnidirectional imaging system a paraboloidal mirror was developed a paraboloidal catadioptric omnidirectional image.
进而研制出抛物面反射镜,建立了抛物面折反射全景成像系统.
英汉双解词典包含4367426条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。