Question #1140
What is the purpose of external source for passive sensors? | ನಿಷ್ಕ್ರಿಯ ಸಂವೇದಕಗಳಿಗೆ ಬಾಹ್ಯ ಮೂಲದ ಉದ್ದೇಶವೇನು?
Explanation
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No explanation provided.