Manufacturing And Production Technology
The lip clearance angle is the angle formed by the

Flank and a plane at right angles to the drill axis
None of the listed here
Leading edge of the land with a plane having the axis of the drill
Chisel edge and the lip as viewed from the end of a drill

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Manufacturing And Production Technology
In a CNC program block, N002 GO2 G91 X40 Z40......, GO2 and G91 refer to

Circular interpolation in counter clockwise direction and incremental dimension
Circular interpolation in clockwise direction and absolute dimension
Circular interpolation in clockwise direction and incremental dimension
Circular interpolation in counter clockwise direction and absolute dimension

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