This is the AutoCAD online book I used to learn and understand how AutoCAD works.
Photos Show: Lessons 5
1-6 examples of drawings
Angle Spacer
2. T-Clip
3. Base Plate
4. Circular Spacer
5. Channel Plate
Photos Show Lessons 6
Examples 1- 4
Adjustable Support 2
2. Journal Bracket
3. Flat Hook
4. Support Base
5. Indexing Base