In which of the following machine, the work usually rotated while the drill is fed into work?

Sensitive drilling machine

Radial drilling machine

Gang drilling machine

Deep hole drilling machine

Morse taper

Seller's taper

Chapman taper

Brown and Sharpe taper

smoothing and squaring the surface around a hole

sizing and finishing a small diameter hole

producing a hole by removing metal along the circumference of a hollow cutting tool

cutting helical grooves on the external cylindrical surface

making a cone-shaped enlargement of the end of a hole

smoothing and squaring the surface around a hole

sizing and finishing a small diameter hole

producing a hole by removing metal along the circumference of a hollow cutting tool

making a cone-shaped enlargement of the end of a hole

smoothing and squaring the surface around a hole

sizing and finishing a small diameter hole

producing a hole by removing metal along the circumference of a hollow cutting tool