______________ is mainly used for grading purpose.

In _________ method, the depreciation of properties assumed to be equal to the annual sinking fund plus the interest on …

In a Trencher, a series of small cutting ________ attached to two endless chains which are supported by a boom.

_________________ drilling has rapidly become an inexpensive alternative to outdated mechanical hole drilling methods.

__________________ is the process of using a drill bit in a drill to produce cylindrical holes in solid materials, such …

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

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

_______________ is a Rotary type drill and its abrasive power depends on the bit which is in the form of a section of st…