externally quenched counter tube

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Tube bending — Bent tubing Shown is a trombone, it displays some U bends Tub … Wikipedia
Pipe and tube bender — Tube and pipe benders are machines which bend tube, pipe and solid metals. Pipe bending machines can either be human powered, hydraulic assisted, or hydraulic motor driven. In the pipe bending operation the tube may be supported internally or… … Wikipedia

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