Computer · Public Health Engineering
मानक सैनिटरी ट्रैप में वाटर सील (जल मुहर) की गहराई आमतौर पर कितनी बदलती है?
- 15 से 10 सेमी
- 23.5 से 7.5 सेमी
- 32.5 से 7.5 सेमी✓
- 43.0 से 7.5 सेमी
सही उत्तर देखें
2.5 से 7.5 सेमी
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