题目内容

Cycle time of ( ) is much faster than other processes and the part cost can be low.

A. compression moulding
B. casting moulding
C. injection moulding

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中英文配对

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