________________ is used to excavate the trenches of width from 250 mm to 450 mm and depth 4 m with accuracy and speed.

_________________ drilling has rapidly become an inexpensive alternative to outdated mechanical hole drilling methods.

_________________ bits are specially used for very hard materials.

A ___________ Dredger consists of an endless chain of bucket mounted on a ladder.

________________ are usually mounted on two or four pneumatic tyred wheels.

A __________ is a power driven hammer used to shape forgings.

In __________ type of drill, the grinding of rock into small particles is carried out through the Abrasive effect of a b…

With the help of ___________ the materials are transported with a continuous flow at comparatively high speeds.