Extruded section

From International Dictionary of Marine Aids to Navigation
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Rods, tubes or sections of intricate shape formed by forcing metal or plastic through a die shaped to the required section.

The process may be undertaken hot or cold depending on the material.

Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)

International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM