Structure of Social Security Numbers. A Social Security Number (SSN) consists of nine digits, commonly written as three fields separated by hyphens: AAA-GG-SSSS. The first three-digit field is called the area number. The central, two-digit field is called the group number. The final, four-digit field is called the serial number.
Fabrication, is the building of something brand new, that's never been seen before, or invented. Manufacturing, is the duplication of something on a mass scale. Generally, the way it works is, you fabricate something that you need, then manufacture what you fabricate. A good example is, a car company decides to design a brand new car from the ground up.
When discussing the definition of metal fabrication, it helps to understand that metal is one of the most common types of raw material used in the manufacturing industry. The basic metal fabrication process forms, shapes and joins metal together through the removal or deformation of the material. Sheet metal stock has a thickness of between 0.006 and 0.25 inches, as compared to thinner metal called foil, and a thicker material called a plate.