The title bar is generally composed of name, code area, signature area, change area and other areas, which is used to explain the name and number of the drawing, the signature of the person in charge, and the modification record of local contents in the drawing. The title number of the title bar of the water diagram can generally be written in the upper right or lower right position.
Engineering drawing is an important process in engineering technology. It is an important basic compulsory course in higher engineering courses. This course is a subject to study the drawing and reading of engineering drawings. It studies how to use projection method (see descriptive geometry) to solve space geometry problems and express space objects on the plane.