Answer is:
producing a hole by removing metal along the circumference of a hollow cutting tool
Explanation:
Trepanning is an operation of producing a hole by removing metal along the circumference of a hollow cutting tool.
Answer is:
counter-sinking
Explanation:
Countersinking is an operation of bevelling the end of a drilled hole. The tool used is called a countersink.
Answer is:
spot facing
Explanation:
The process of producing a flat seat for a bolt head at the opening of a drilled hole is called as Spot Facing.
Answer is: