consists of a number of small lenses arranged to make a lightweight lens of large diameter and short focal length.
英
美
- 由许多小镜头排列以制成大直径短焦距的轻型镜头。
- 今日热词
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- 深远海浮式风电平台 - deep-sea floating wind power platform
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- 京雄高速公路 - Beijing-Xiongan expressway
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- 农业及相关产业增加值 - the added value of agriculture and related industries