Chemistry · Industrial Chemistry
पोर्टलैंड सीमेंट में मौजूद सिलिका की अनुमानित मात्रा कितनी होती है?
- 147% और 55% के बीच
- 217% और 25% के बीच✓
- 337% और 45% के बीच
- 427% और 35% के बीच
सही उत्तर देखें
17% और 25% के बीच
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