Science · Chemistry
1824 में पोर्टलैंड सीमेंट का आविष्कार किसने किया?
- 1एक फ्रांसीसी इंजीनियर
- 2एक अमेरिकी इंजीनियर
- 3एक ब्रिटिश इंजीनियर✓
- 4एक जर्मन इंजीनियर
सही उत्तर देखें
एक ब्रिटिश इंजीनियर
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