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Complex systems of vessels, tubes, and spigots.

Complex systems of vessels, tubes, and spigots.

Picryl description: Public domain image of an industrial equipment, workshop, assembly line, factory, power engine, 19th-20th century, free to use, no copyright restrictions.

Complex systems of vessels, tubes, and spigots.

Complex systems of vessels, tubes, and spigots.

Public domain scan of technical drawing, free to use, no copyright restrictions image - Picryl description