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單項(xiàng)選擇題

Which of the following nondestructive testing methods can be used to detect a suspected subsurface defect in a tail-shaft liner?（）

A.Dye penetrant
B.Magnetic particle
C.Ultrasonic
D.All of the above

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單項(xiàng)選擇題

To anneal a copper gasket, you should heat the gasket（）

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

單項(xiàng)選擇題

A drilled hole is accurately finished to size with a （）

A.center drill
B.finish drill
C.broach
D.reamer

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