Kis Desh Ke Vaigyanikon ne Vishwa Ki Pehli 3 D mudrit Pahanne Yogya Battery Banai Hai ।

Q.821: किस देश के वैज्ञानिकों ने विश्व की पहली 3 डी मुद्रित पहनने योग्य बैटरी बनाई है।
A.
B.
C.
D.
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