UPSC CDS Previous Papers 2014 (II) General Knowledge - Bilingual — Flashcards | Defence Exams in India | FatSkills

UPSC CDS Previous Papers 2014 (II) General Knowledge - Bilingual — Flashcards

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The upper and lower portions in common type of bi-focal lenses are respectively सामान्य प्रकार के द्विफोकसी लेन्सों के ऊपरी तथा निचले भाग क्रमश:
concave and convex/अवतल और उत्तल होते हैं
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