______________ are used to excavate underwater material.

A Grader which is told by a tractor is known as _____

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

_____________________ are the bits used for drilling ceramic tiles and glass with a ground tungsten carbide tip.

__________________ indicates the time duration by which we comes to know about the destructive period of an equipment.

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

The replacement of the equipment also depend on the _____

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