________________ is an air operated drill which can easily be carried from one place to the other.

________________ based lubricants do not work well on diamond drill bits.

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

The trucks with automatic unloading device are called ____________

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

_______________ are used to change the direction of ropes and to raise greater loads with less efforts.

____________________ are ideal for drilling large diameter and deep holes in wood or thick man-made boards.

A ____________ consists of a coil whose diameter is about 50 mm to 100 mm.