| A | B |
|---|
| visualization | ability to see clearly what a machine, device, or other object looks like in the minds eye |
| implementation | is the drawing of an object that has been visualized |
| multiview drawing | is the exact representation of two or more views of an object on a plane |
| vertical plane | up and down plane (XY) |
| horizontal plane | side to side plane (XZ) |
| profile plane | side view (YZ) |
| first angle projection | front, top, and left side view |
| third angle projection | top, front, right side view |
| hidden lines | show interior and exterior features that cannot be seen in the views |
| when a hidden line and a visible line project at the same place | show the hidden line |
| hidden line is a continuation of a visible line | space is left between the visible line and the first dash of the hidden line |
| when a centerline and a hidden line project at the same place | draw the hidden line |
| centerlines | used to locate views and dimensions and locate the center on symmetrical views where one part is the mirror image of another |
| Width & Height | Distance shown in a front view |
| Depth & Width | Distance shown in a top view |
| Depth & Height | Distance shown in a right side view |
| Primary Centerlines | Used as major locating lines to help in making the views |
| Secondary Centerlines | Used for drawing details of a part |
