Like Download 1.51 MB Wood cog 3686 x 2400 pixels Aspect ratio 1843:1200 NIKON D610 85 mm f/2.8 1/160 s ISO 1000 Online since: 22 October 2017 Taken: 21 October 2017 CC0 / Public Domain machine mill industry steam milling machining tool equipment industrial metal factory technology engineering workshop steel precision processing mechanical machinery heavy process manufacturing