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Practice #24,196
Q
निम्न पृथ्वी कक्षा (LEO) नेविगेशन लेयर को टेस्ट करने के लिए पहला ‘सेलेस्टे’ सैटेलाइट किसके द्वारा लॉन्च किया गया? / Who launched the first ‘Celeste’ satellite to test the LEO navigation layer?
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