_In drilling Bakelite and fibrous plastics, the point angle of a drill

1.	_In drilling Bakelite and fibrous plastics, the point angle of a drill is$?
A.	90¬¨‚àû
B.	118¬¨‚àû
C.	135¬¨‚àû
D.	150¬¨‚àû
Answer» B. 118¬¨‚àû

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_In drilling Bakelite and fibrous plastics, the point angle of a drill is$?

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