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ओटो विख्तर्ले | ओटो विख्तर्ले कौन थे ? | ओटो विख्तर्ले बायोग्राफी | ओटो विख्तर्ले गूगल डूडल. Otto Wichterle Google Doodle ओत्तो विख़्तर्ले की 108वीं जयंती ओटो विख्तर्ले जो सॉफ्ट कॉन्टैक्ट लेंस के आविष्कारक थे। वह एक चेक केमिस्ट थे, ...
