स्टील को जंग रोधी बनाने के � – McqOptions

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1.	स्टील को जंग रोधी बनाने के लिए इसमें कौन सी धातु मिलाई जाती है -
A.	क्रोमियम
B.	एल्युमिनियम
C.	कार्बन
D.	कॉपर
Answer» B. एल्युमिनियम

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