Physics · Machine Elements
एक स्वतः-लॉकिंग (self-locking) पावर स्क्रू की अधिकतम दक्षता कितनी होती है?
- 150% से कम✓
- 2ठीक 55%
- 3ठीक 60%
- 4ठीक 70%
सही उत्तर देखें
50% से कम
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