हेनरी बेसेमर ने क्या आविष् – McqOptions

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1.	हेनरी बेसेमर ने क्या आविष्कार किया?
A.	अल्युमीनियम
B.	विद्युत
C.	स्टील कन्वर्टर
D.	स्टील रोलिंग मिल
Answer» D. स्टील रोलिंग मिल

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