A _____________ is a mechanism in the shape of a cylinder or drum, over which rope or chain is wound.

________________ is used for rolling and compacting the subgrade, the base and the surface of many types of roads.

A ________ is used to level the ground and spreads the loose material.

______________ are used to excavate underwater material.

In __________ the owner has to invest a certain amount for the purchase of an equipment.

____________________ is a air operated drill similar to Jack hammer.

A ___________ Dredger consists of a pontoon carrying a frame in which a revolving boom is fixed.

The _________ is gripped by a chuck at one end of the drill and is pressed against the target material and rotated.