The cutting speed for drilling copper with high speed steel drills va

1.	The cutting speed for drilling copper with high speed steel drills varies from
A.	10 to 20 m/min
B.	18 to 30 m/min
C.	24 to 45 m/min
D.	60 to 90 m/min
Answer» C. 24 to 45 m/min

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The cutting speed for drilling copper with high speed steel drills varies from

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