অনুসন্ধান করুন
Fresnel lens
01
lens composed of a number of small lenses arranged to make a lightweight lens of large diameter and short focal length
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নিকটবর্তী শব্দ
অ্যাপ ডাউনলোড করুন
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অনুসন্ধান করুন
lens composed of a number of small lenses arranged to make a lightweight lens of large diameter and short focal length