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

________________ are Steel bits which are screwed to the ends of drill rods and they can be attached to or removed from …

_________________ are extra wagons attached to the tractors or trucks.

__________________ ropes consists of strands of wire of iron, Steel, etc. which are twisted around the core of hemp.

In _______________ type of gantries, derricks are built on specially constructed tower at site of work.

In _________ method, it is assumed that a property will lose its value by a constant percentage of its value and the beg…

_______________ are the most commonly used equipment for transportation.

________________ are drifters which are mounted on masts and masts are mounted on two wheels to provide easy portability…