![](http://www.alamy.com/thumbs/6/7E8730F5-4326-4D42-9000-815B23A30885/2HAB00F.jpg)
Differential pulley block, Weston system, , (architectural history
Size: 1342px × 3130px
Photo credit: © Quagga Media / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: architecture, architektur, art, black, cut, device, devices, draw, drawing, drawn, engraving, gerä, geräte, hand, historical, illustration, illustrations, line, lineart, monochrome, tool, tools, vintage, werkzeug, werkzeuge, white, wood, woodcut, woodengraving