out of the following methods ,one is method used flame hardening process?

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Mr. Dubey

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📊 Engineering Metallurgy

Q. out of the following methods ,one is method used flame hardening process?

(A) stationary method
(B) circular and progressive method
(C) spiral and progressive method
(D) all of the above

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✅ Correct Answer: (D) all of the above

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