![](http://www.alamy.com/thumbs/6/5A7611F1-CBBE-4B5B-B64B-668F05FF43D1/EAW51W.jpg)
Tube Knotted
Size: 2592px × 3888px
Photo credit: © Luigi Apogeo / Alamy / Afripics
License: Royalty Free
Model Released: No
Keywords: abstract, climate, close-, closeup, concept, connecti, connection, cool, crossing, danger, economy, emission, environmental, funnel, heat, industrial, industry, infrastructure, knot, knots, line, metal, pipe, pipeline, pipes, silver, steel, symbol, technology, tube, tubes, vapor