Question

drilling can also carried out by_​

Answer 1

• The operations that are commonly performed on drilling machines are drilling, reaming, lapping, boring, counter-boring, counter-sinking, Spot facing, and tapping. This is the operation of making a circular hole by removing a volume of metal from the job by a rotating, cutting tool called drill.

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Answer 2

Answer:

off-shore(from the ocean floor)

Explanation:

the method of mining is called as drilling and drilling is also called as off-shore.

Because, it is done on top of ocean