Image: Triple expansion marine steam engine

Original image(1,178 × 886 pixels, file size: 865 KB, MIME type: image/jpeg)

Description: Triple expansion marine steam engine on the 1907 ocean going tug boat Hercules, San Francisco, CA.
Title: Triple expansion marine steam engine
Credit: Original digital photograph by the uploader, Centpacrr
Author: Centpacrr (Digital image)
Usage Terms: Creative Commons Attribution-Share Alike 3.0
License: CC BY-SA 3.0
License Link: http://creativecommons.org/licenses/by-sa/3.0
Attribution Required?: Yes

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