In ____________ drilling pattern, the drill holes are arranged nearly parallel in horizontal plane with a slight inclina…

In _________ the bits for Jack hammer and drifters are forged on one end of the drill Steel.

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

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

______________ ropes are widely used for hoisting purpose and they consist of fibre suitably bound together.

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

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

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