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Match the parts and moulds

Which one is not the heat treatment of metal?

A. quench
B. tempering
C. annealing
D. shaping

In order to make metal becoming softer and much easier to machine, （）is a good heat treatment.

A. quench
B. annealing
C. tempering

We can make steel harder by ( )

A. quench
B. annealing
C. tempering
D. normalizing