gear collection 1，high quality detail。include these gear sets:

1. Spur Gears;

2. Helical Gears;

3. Straight Bevel Gears;

4. Helical Bevel Gears;

5. Spiral Bevel Gears;

6. Hypoid Gears;

7. Crossed Helical Gears;

8. Herringbone Gears;

9. Worm Gears;

10. Rack Drive Gears;

11. Internal Gears;

12. Planet Gears;