That's a complicated knot, nearly as tangled as the enormous pile of intertwined copper tubes in «Structure and Flow No. 2,» the mammoth Wilshire Boulevard fountain. (latimes.com)
Using copper tubing as a template, Sonnier began sketching lines, arches and curves ultimately realized in glass tubing enclosed neon. (pacegallery.com)
(We did the experiment using a trashed 3 meter satellite dish (the mesh was covered with a special 24 gage aluminum foil) and a 1 foot carbon black coated copper plate with silver soldered copper tubing placed at the focus. (realclimate.org)