Computer · Building Materials
अच्छी ईंट बनाने वाली मिट्टी (brick earth) में भार के अनुसार लगभग कितना सिलिका होना चाहिए?
- 115% - 20%
- 210% से कम
- 350% - 60%✓
- 45% - 7%
सही उत्तर देखें
50% - 60%
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