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The operation which is used to enlarge the diameter of an existing hole is
Which of the following element increases strength without decreasing ductlity ?
Iorn -carbon alloys which contain 2.2 to 4.3 % carbon is called
Which of the following hardening processes is not employed for steels?
Crystal structure of metals can be studied with the help of
Which of the following retards the grain growth in austinite ?
现已上线!2025 年 Telegram 研究 — 年度关键洞察 
