Edited by Marie Studer, some rights reserved (CC BY-SA)
Photo Credits
- 1. (c) manual crank, some rights reserved (CC BY-NC-SA)
- 2. (c) Jason Sharp, all rights reserved, uploaded by Jason Sharp
- 3. (c) Rich McGervey, some rights reserved (CC BY-NC-SA)
- 4. (c) dougmino, some rights reserved (CC BY-NC-SA)
- 5. (c) KENPEI, some rights reserved (CC BY-SA)