![](http://www.alamy.com/thumbs/6/A6E35164-555F-4576-8C0F-9BE431BB1C77/J4BP0B.jpg)
PSM V36 D492 Two post trusses forming the basic cantilever
Size: 2534px × 986px
Photo credit: © The History Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ancient, art, book, bygone, copy, cover, drawing, editorial, historic, history, illustration, line, map, news, painting, photo, photograph, photography, space, stock, textbook, vintage