*/*_Low helix angle drills are preferred for drilling holes in?

1.	/_Low helix angle drills are preferred for drilling holes in?
A.	Plastics
B.	Copper
C.	Cast steel
D.	Carbon steel
Answer» B. Copper

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*/*_Low helix angle drills are preferred for drilling holes in?

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/_Low helix angle drills are preferred for drilling holes in?