Shat does it mean? how does it work? why do we use it?
Bill says...
Hello Ahmad and thanks for visiting my site and for writing in.
I think if you read all of this page , from top to bottom, it will give you a good idea of how compressed air is a factor for all of us, almost every day.
If you take the time to read more of the pages, all of your other questions will be answered as well.