![](http://www.alamy.com/thumbs/6/EB394DB3-D0ED-4123-8BE5-220CC2EB374F/EC1BD2.jpg)
Tube Knotted
Size: 3888px × 2513px
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