單項選擇題

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

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

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單項選擇題

Which of the files listed is tapered on three sides and is used to file acute internal angles?（）

A.Mill
B.Round
C.Square
D.Triangular

單項選擇題

Using a file without a handle may result in （）

A.your work becoming rounded
B.injury to your hand
C.overheating of the file
D.pinning

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