For a lot of people, nail biting is a manifestation of stress or psychological disorders. âBoth tend to cause teeth grinding, and your fingernails are a handy buffer.â Youâll have a hard time stopping without help from a psychiatrist or mental-health professional, he says.
The first type of sawing machine is the band saw. A band saw has a jagged metal strip that moves in one continuous motion. Band saws are commonly used in workshops to make curved or straight cuts. There are different kinds of blades as well.
You have to see this saw! Incredible 45,000-ton machine has blade the size of a four-storey building. These images show the enormous scale of the world's biggest saw - capable of mining more than 4,500 tons of coal per hour.