Computer · Building Materials
एक अच्छी ईंट की मिट्टी में एल्युमिना का प्रतिशत निम्नलिखित में से किसके बीच होना चाहिए?
- 150% से 60%
- 240% से 50%
- 330% से 40%
- 420% से 30%✓
सही उत्तर देखें
20% से 30%
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