55.6 MB (15.1 MB compressed)
3583 x 5428 pixels
30.2 x 46.0 cm ⏐ 11.9 x 18.1 in (300dpi)
ER DEGGINGER / SCIENCE PHOTO LIBRARY ER DEGGINGER / SCIENCE PHOTO LIBRARY
Block and tackle pulley crane. This crane uses several block and tackle's (a 'simple machine') to create mechanical advantage.
Model release not required. Property release not required.