Physics · Power Transmission
भूमिगत बिजली के केबलों से आमतौर पर कितनी परिचालन अवधि की उम्मीद की जाती है?
- 15-10 वर्ष
- 240-50 वर्ष✓
- 322-36 वर्ष
- 435-55 वर्ष
सही उत्तर देखें
40-50 वर्ष
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