A.Develop ductility
B.Improve machining qualities
C.Relieves stresses
D.All of the above
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A.Dye penetrant
B.Magnetic particle
C.Ultrasonic
D.All of the above
A.and quench it in oil
B.cherry red and quench in water
C.and let it cool slowly in the air
D.and carbonize
A.center drill
B.finish drill
C.broach
D.reamer
A.Mill
B.Round
C.Square
D.Triangular
A.your work becoming rounded
B.injury to your hand
C.overheating of the file
D.pinning
最新試題
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