railway RRB JE (CBT I + CBT II) Mock Test 2024 Construction Materials and Management Steel

कठोर-इस्पात में कार्बन सामग्री (%) कितना होता है?

1
0.5 - 0.8
2
0.8 - 1.5
3
0.3 - 0.5
4
0.15 - 0.3
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