____________________ laser drilling is a method used to remove a cylindrical Core, or circular disc from a substrate.

_________________ are also known as a wood or dowel bit.

________________ based lubricants do not work well on diamond drill bits.

________________ consist of a vibrating unit mounted on a screed, plate or roller.

__________________ is used for designing the old road to a predetermined depth.

A ___________ Dredger essentially consist of sand pump which excavates and transport the bed material in one operation.

_________________ types of equipments are characteristics of both, intermittent as well as continuous flow type equipmen…

________________ is an air operated drill which can easily be carried from one place to the other.