_________________ drilling has rapidly become an inexpensive alternative to outdated mechanical hole drilling methods.

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

__________________ type of scraper consists of a four wheeled scrapper bowl towed behind crawler Power unit.

The ____________ compact soil close to the earth surface only.

_________________ are also known as a wood or dowel bit.

____________________ is a air operated drill similar to Jack hammer.

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

The replacement of the equipment also depend on the _____