In sets theory, you will learn about sets and it’s properties. It was developed to describe the collection of objects. You have already learned about the classification of sets here. Theset theorydefines the different types of sets, symbols and operations performed. ...
Some welding symbols may show a contour finish that details how the fillet weld shape must be finished after welding. The contour may be flat or convex (having a surface that is curved or rounded outward) and the element to describe this is placed above the slope on the fillet weld symbol...