Teaching Railway Teacher PRT 2025 Mock Test Series General Science Chemistry Surface Chemistry

खालीलपैकी कोणत्या संमिश्र धातूत क्रोमिअम आढळते?

1
स्टील 
2
स्टेनलेस स्टील 
3
मॅगनालिअम 
4
पितळ 
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