1.
A taper provided on the pattern for its easy and clean withdrawal from the mould is known as

2.
Blanking and piercing operations can be performed simultaneously in a

3.
A file with 20 teeth in 25 mm is called

4.
For welding plates of thickness less than 5 mm, its edges

5.
The accuracy of micrometers, calipers, dial indicators can be checked by a

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