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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 | |