1.

Tempering is achieved by heating hardened steel to a temperature in the range of ______

A. 100⁰C – 150⁰C
B. 100⁰C – 680⁰C
C. 200⁰C – 375⁰C
D. 300⁰C – 835⁰C
Answer» C. 200‚Äö√Ñ√∂‚àö√ñ‚Äö√†√ªC ‚Äö√Ñ√∂‚àö√ë‚àö¬® 375‚Äö√Ñ√∂‚àö√ñ‚Äö√†√ªC


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