_________________ is a rotary drill and it consists of steel pipe stem on the bottom of which is attached to a roller bi…

______________ are used to excavate underwater material.

______________________ is used to heat bitumen before it is applied on the road surface.

A _______________ is also known as roto-hammer drill or masonry drill.

Due to ___________ the equipment seems physically sound but it becomes old fashioned and the rate of its output becomes …

________________ are drifters which are mounted on masts and masts are mounted on two wheels to provide easy portability…

A _________ dredger essentially consist of a graph suspended from cable.

__________________ laser drilling uses a rapid fire burst of pulses micro-machining method.