Oxygen to acetylene ratio in case of carburising flame is _____.
2 : 1
0.9 : 1
1 : 1
1 : 1.2
Option 2 : 0.9 : 1
Oxygen to acetylene ratio in case of carburising flame is _____.
2 : 1
0.9 : 1
1 : 1
1 : 1.2
Option 2 : 0.9 : 1
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