In the technique, use several types of lines, each of which has a meaning and the usefulness different. To be able to read or understand, and do not give rise to different interpretations then set a rule on how to use lines in engineering drawings.
Figure 2.9. The use of thick lines
Figure 2.10. The use of a thin line as shading
Figure 2.11. The use of dotted lines
Figure 2.12. The use of strip lines point the strip
Figure 2.13.Penggunaan dotted line